Breast Cancer Treatment Sleep: Mattress and Recovery Canada

8 min read

Why Breast Cancer Treatment Disrupts Sleep

Sleep is not a luxury during cancer treatment. It is a biological necessity that directly influences immune function, tissue repair, pain tolerance, and emotional resilience. Yet breast cancer treatment attacks sleep from nearly every angle, creating a compounding cycle where poor sleep worsens treatment side effects, and worsening side effects further erode sleep quality.

The Canadian Cancer Society reports that breast cancer is the most commonly diagnosed cancer among Canadian women, with approximately 29,000 new cases expected each year. Behind each of those numbers is a person whose sleep has likely been profoundly altered by their diagnosis and treatment.

Understanding exactly how each treatment phase affects sleep is the first step toward reclaiming rest. Different treatments create different sleep challenges, and each requires a specific approach to mattress selection and sleep environment design.

The sleep challenges associated with breast cancer treatment are not a single problem with a single solution. They are a collection of distinct physical and emotional disruptions that overlap and interact. Surgery creates acute pain and positional restrictions. Chemotherapy triggers temperature dysregulation and nausea. Radiation causes skin sensitivity. Hormone therapy induces insomnia and sweating. And underlying everything is the psychological burden of living with a cancer diagnosis.

A mattress cannot cure cancer. But the right sleep surface can address many of the physical barriers to rest, reduce pain and discomfort, support proper recovery positioning, and create an environment that gives your body the best possible conditions for healing.

Post-Surgery Sleep Challenges: Mastectomy and Lumpectomy

Whether you have undergone a mastectomy, lumpectomy, or bilateral mastectomy, the surgical recovery period presents immediate and intense sleep challenges. The chest wall, shoulder, and underarm areas are all affected, creating pain patterns that make familiar sleeping positions impossible.

Positional Restrictions After Surgery

After a mastectomy, most surgeons instruct patients to sleep on their back in a semi-reclined position for at least the first two to four weeks. This position reduces swelling, protects the surgical site, and prevents strain on the incision. For people who have always been side sleepers or stomach sleepers, this restriction alone can cause significant insomnia.

The mattress becomes critically important in this context. A surface that is too firm will create painful pressure points against the shoulder blades and lower back during prolonged back sleeping. A surface that is too soft will allow the body to sink unevenly, pulling on the surgical site and creating tension across the chest.

Drain Management During Sleep

Many mastectomy patients go home with surgical drains, small tubes that collect fluid from the surgical site. These drains typically remain in place for one to three weeks and add another layer of complexity to sleep. Rolling onto a drain is painful and potentially dangerous, and the drain bulbs need to remain below the level of the surgical site.

A mattress with responsive but gentle support helps patients maintain their position throughout the night without the surface actively pushing them into uncomfortable arrangements. Innerspring mattresses with individually wrapped coils respond to movement without transferring it across the bed, which is particularly important if you share your bed with a partner.

Shoulder and Chest Wall Pain

Surgical pain in the chest wall can persist for weeks to months after the procedure. Nerve damage during surgery (post-mastectomy pain syndrome) can create chronic burning, shooting, or aching sensations that worsen when lying down. This pain often radiates into the armpit, upper arm, and shoulder blade area.

Pressure-relieving comfort layers in a mattress help distribute body weight more evenly, reducing the concentrated force on sensitive surgical areas. Zoned coil systems that provide softer support in the shoulder region and firmer support through the lumbar area accommodate the unique pressure distribution needs of post-mastectomy patients.

Lumpectomy-Specific Considerations

While lumpectomy recovery is generally less restrictive than mastectomy recovery, sleep disruption still occurs. The affected breast may be swollen, tender, and sensitive to pressure for several weeks. Side sleeping on the affected side is typically uncomfortable for at least two to four weeks post-surgery. Wearing a supportive surgical bra during sleep is often recommended, and a mattress that does not create additional compression against the chest area makes this more tolerable.

Chemotherapy, Hot Flashes, and Temperature Regulation

Chemotherapy is one of the most disruptive treatments for sleep, and its effects extend well beyond the infusion days themselves. The medications used in breast cancer chemotherapy can cause nausea, fatigue, pain, cognitive changes, and, most relevant to mattress selection, severe temperature dysregulation.

Chemotherapy-Induced Hot Flashes

Many chemotherapy regimens for breast cancer push the body into a state of chemical menopause by suppressing ovarian function. This sudden hormonal shift triggers intense hot flashes and night sweats that can be far more severe than those experienced during natural menopause. Younger women, who may be premenopausal at diagnosis, often experience the most dramatic temperature fluctuations because the hormonal change is so abrupt.

Hot flashes during sleep typically follow a predictable pattern: a sudden surge of heat that begins in the chest and face, followed by profuse sweating, followed by chills as the sweat evaporates. This cycle can repeat multiple times per night, each time pulling you out of deeper sleep stages and preventing restorative rest.

Why Mattress Materials Matter for Temperature

Not all mattress materials handle heat equally. Traditional memory foam is notorious for trapping body heat in a "heat sink" effect, where the foam absorbs and retains warmth, creating an increasingly hot sleep surface as the night progresses. For someone experiencing chemotherapy-induced hot flashes, this can turn an already difficult night into an unbearable one.

Natural fibre comfort layers, particularly wool and silk, offer a significant advantage. Wool naturally wicks moisture away from the body, pulling sweat to the outer surface of the fibre where it can evaporate. Silk provides a cool, smooth surface that does not retain heat. These materials work with the body rather than against it, helping to moderate temperature swings without creating a cold, clammy feeling during the chill phase that follows a hot flash.

Innerspring and hybrid mattresses also have an inherent thermal advantage over all-foam designs. The open coil structure allows air to circulate freely through the mattress interior, preventing the heat buildup that occurs in solid foam blocks. This passive ventilation system works continuously without requiring any powered cooling technology.

Nausea and Sleep Position

Chemotherapy-induced nausea can persist for days after treatment and often worsens when lying flat. Sleeping in a slightly elevated position can help reduce nausea, and a mattress that supports this position without sliding or bunching is important. Some patients find that sleeping on their left side reduces acid reflux symptoms that accompany chemotherapy nausea, making side-sleeping comfort a priority for their mattress choice.

Fatigue Paradox

One of the cruellest aspects of chemotherapy is the fatigue paradox: patients feel profoundly exhausted yet cannot sleep well. Chemotherapy fatigue is not the same as ordinary tiredness. It is a deep, whole-body weariness that does not resolve with rest, partly because the treatment itself disrupts the sleep architecture needed for genuine recovery. A comfortable, supportive mattress cannot eliminate chemotherapy fatigue, but it can remove physical barriers to the sleep that does occur, helping patients maximize the restorative value of whatever rest they manage to get.

Radiation Therapy and Skin Sensitivity

Radiation therapy for breast cancer typically involves daily treatments over several weeks, and the cumulative effect on the skin can significantly impact sleep comfort. Understanding how radiation affects the skin helps explain why mattress material choices matter during this treatment phase.

Radiation Dermatitis and Sleep Surface Contact

As radiation treatments progress, the skin in the treatment area often develops radiation dermatitis, a sunburn-like reaction that can range from mild redness and dryness to peeling, blistering, and raw, weeping skin. This affected skin is in direct or near-direct contact with your mattress and bedding every night.

Mattress materials that create friction, generate heat, or trap moisture against the skin can worsen radiation dermatitis symptoms. Rough or textured mattress covers, synthetic fabrics that do not breathe, and heat-retaining foams all create conditions that irritate already sensitive skin.

Positioning Around the Treatment Area

Radiation for breast cancer is typically directed at the breast or chest wall, and sometimes the axillary (underarm) lymph nodes. The treatment area may extend from the collarbone to below the breast and from the sternum to the side of the chest. This large area of potentially sensitive skin makes finding a comfortable sleep position challenging.

Side sleeping on the radiated side is often uncomfortable or painful. Back sleeping puts direct pressure between the irradiated skin and the mattress through sheets and clothing. Even the non-treated side can become sore from overuse as patients unconsciously favour it throughout the night.

A mattress with a responsive comfort layer that conforms gently to the body without creating concentrated pressure points helps distribute contact pressure across a wider area, reducing the intensity of friction and compression on any single patch of sensitive skin.

Late Radiation Effects

Some patients develop late radiation effects months or years after treatment, including skin fibrosis (thickening and tightening), chronic tenderness, and chest wall pain. These long-term changes mean that the mattress selected during active treatment may need to serve ongoing recovery needs well beyond the treatment period itself.

Hormone Therapy Insomnia and Night Sweats

For women with hormone-receptor-positive breast cancer, which accounts for roughly 70% to 80% of all breast cancer diagnoses, hormone therapy is a critical component of treatment. This therapy typically continues for five to ten years after primary treatment, making it the longest-lasting source of sleep disruption for many breast cancer patients.

Tamoxifen and Sleep

Tamoxifen, one of the most commonly prescribed hormone therapies for premenopausal breast cancer patients, blocks estrogen receptors in breast tissue. However, its effects extend beyond the breast, triggering hot flashes, night sweats, mood changes, and insomnia. Studies show that up to 65% of women taking tamoxifen report significant sleep disturbance, with night sweats being the most frequently cited cause.

Tamoxifen-related night sweats can be drenching, soaking through nightclothes and sheets. The frequency varies from a few episodes per week to multiple episodes per night. For women who will be taking this medication for years, the cumulative sleep debt can be enormous, and addressing the sleep environment becomes not just a comfort issue but a health priority.

Aromatase Inhibitors and Joint Pain

Aromatase inhibitors (AIs) such as letrozole, anastrozole, and exemestane are typically prescribed for postmenopausal breast cancer patients. While they share tamoxifen's tendency to cause hot flashes and insomnia, AIs add another significant sleep-disrupting symptom: joint and muscle pain.

Aromatase inhibitor-associated musculoskeletal syndrome (AIMSS) affects up to 50% of patients and typically presents as morning stiffness, joint pain (particularly in the hands, wrists, knees, and hips), and muscle aches. These symptoms are often worst upon waking, suggesting that sleep position and mattress support play a role in their severity.

The Five-to-Ten-Year Perspective

Because hormone therapy continues for years, the mattress you choose during cancer treatment needs to serve you well over the long term. This is not a temporary situation requiring a temporary solution. The sleep challenges of hormone therapy are ongoing, and investing in a mattress that addresses temperature regulation, joint support, and overall comfort is an investment in years of better sleep and better quality of life.

This long-term perspective also means that mattress durability matters. A mattress that sags, develops body impressions, or loses its temperature-regulating properties after a year or two will need replacement during a period when additional expenses may already be a burden. Quality construction and durable materials pay for themselves over the course of extended hormone therapy.

Lymphedema and Arm Positioning During Sleep

Lymphedema, a chronic swelling caused by damage to or removal of lymph nodes during surgery, affects approximately 20% to 30% of breast cancer patients who undergo axillary lymph node dissection. This condition requires specific attention to arm positioning during sleep, and the mattress plays a role in supporting proper positioning.

Understanding Lymphedema and Sleep

The lymphatic system relies on muscle movement and gravity to circulate lymph fluid. During sleep, when the body is still, lymph fluid can pool in the affected arm, worsening swelling and discomfort. Patients are typically advised to keep the affected arm elevated slightly during sleep, either on a pillow or on a mattress surface that gently supports the arm without creating compression bands.

The affected arm may also be more sensitive to pressure than the unaffected arm. Lying on the affected side can compress the arm and restrict lymphatic flow, increasing swelling by morning. This positional restriction adds to the sleep challenges already created by surgery, radiation, and medication.

Mattress Considerations for Lymphedema

A mattress that supports side sleeping without creating excessive pressure on the shoulder and arm is valuable for lymphedema patients. When sleeping on the unaffected side (the preferred position), the mattress should allow the shoulder to sink in slightly, keeping the spine aligned and preventing the upper arm from being pushed upward into an awkward position.

The mattress surface should be responsive enough that the affected arm, when positioned on a support pillow, does not roll off or shift into a compressed position during the night. A surface with moderate conformity holds positioning accessories in place better than one that is either too firm (causing pillows to slide) or too soft (causing them to sink and shift).

Compression Garments and Sleep

Some lymphedema patients wear compression sleeves or bandages during sleep. These garments add bulk to the arm and can feel warm and restrictive. A breathable mattress that does not add further heat buildup helps keep overall body temperature comfortable when wearing compression garments overnight. Natural fibre mattress materials like wool and silk are particularly beneficial in this context, as they wick moisture and allow airflow even when in contact with compression fabrics.

Emotional and Anxiety-Related Sleep Disruption

It would be incomplete and insensitive to discuss breast cancer sleep disruption without acknowledging the profound emotional and psychological dimensions. A cancer diagnosis changes everything, and the weight of that change settles heavily at night, when distractions fade and worry has room to grow.

Cancer-Related Insomnia

Anxiety, fear, grief, body image concerns, and uncertainty about the future all contribute to cancer-related insomnia. This is not ordinary stress-related sleeplessness. It is a specific form of insomnia driven by the unique psychological challenges of living with a life-threatening illness. Studies published in the Journal of Clinical Oncology show that cancer-related insomnia affects 30% to 50% of cancer patients, far exceeding the rate of insomnia in the general population.

The nighttime hours can become associated with worry and wakefulness, creating a conditioned response where the bedroom itself triggers anxiety. This is why the sleep environment matters beyond just physical comfort. The bedroom needs to feel like a place of safety, comfort, and rest rather than a place where worries overwhelm.

Creating a Sanctuary

While a mattress cannot resolve the emotional challenges of cancer, it can contribute to creating a sleep environment that feels genuinely comfortable and nurturing. There is something deeply important about having a bed that feels good, that supports your body without causing pain, and that does not add to the physical burdens you are already carrying.

The psychological comfort of a quality mattress should not be underestimated. When so much feels out of control during cancer treatment, the ability to create a comfortable, supportive sleep space is a small but meaningful act of self-care. Knowing that your bed is designed to support your specific recovery needs can reduce the anticipatory anxiety that builds as bedtime approaches.

Partner Sleep Disruption

Cancer treatment affects not just the patient but their partner. Night sweats, positional changes, pain-related movements, and anxiety-driven wakefulness can disrupt a partner's sleep, adding relationship stress to an already difficult situation. A mattress with good motion isolation, where movement on one side does not transfer to the other, helps protect both sleepers. Individually wrapped coil systems excel at motion isolation compared to traditional continuous coil designs, allowing each person to move independently without disturbing the other.

Reconstruction Recovery Sleep Needs

For women who choose breast reconstruction, whether immediate (at the time of mastectomy) or delayed (months or years later), another round of surgical recovery creates additional sleep challenges. Reconstruction methods each present their own specific considerations for sleep positioning and mattress needs.

Implant-Based Reconstruction

Implant reconstruction, whether using tissue expanders followed by permanent implants or direct-to-implant approaches, requires careful sleep positioning during recovery. Patients are typically instructed to sleep on their back in an elevated position for several weeks, similar to mastectomy recovery but sometimes with even stricter restrictions to protect the implant placement and pocket formation.

The chest may feel tight and uncomfortable as tissue expanders are gradually filled, creating a persistent pressure sensation that can make it difficult to find a comfortable position. A mattress that provides even, supportive contouring along the back helps reduce additional pressure while maintaining the recommended position.

Flap-Based Reconstruction

Autologous (flap) reconstruction, such as DIEP flap or TRAM flap procedures, involves taking tissue from the abdomen (or sometimes the back or thighs) to create the reconstructed breast. This creates two surgical sites: the chest and the donor site. Patients may have restrictions on both abdominal and chest positions, significantly limiting sleep position options.

The abdominal donor site typically requires patients to sleep with their hips slightly flexed (knees bent, supported by a pillow) to reduce tension on the incision. Combined with the chest positioning requirements, this creates a very specific sleep posture that demands consistent mattress support across multiple body zones.

Long-Term Reconstruction Comfort

Even after full recovery from reconstruction, sleep comfort considerations may persist. Implants may create a different pressure distribution than natural tissue, and reconstructed breasts may be more sensitive to compression. Some women report that lying prone (face down) never returns to its pre-surgery comfort level. These ongoing changes are worth considering when selecting a mattress, as the goal is long-term comfort, not just immediate post-operative recovery.

Mattress Features That Support Cancer Recovery

Based on the specific sleep challenges outlined above, several mattress features emerge as particularly important for breast cancer patients during and after treatment.

Zoned Support Systems

Zoned coil configurations provide different levels of support in different areas of the mattress. Typically, this means softer support at the head and shoulders, firmer support through the lumbar spine and hips, and moderate support at the feet. This zoned approach serves breast cancer patients in several ways:

• Softer shoulder zones reduce pressure on surgical sites and tender chest areas
• Firmer lumbar zones maintain spinal alignment during prolonged back sleeping
• The overall zoned structure accommodates the various pillows and positioning accessories used during recovery
• Reduced pressure on joints helps manage aromatase inhibitor-related joint pain

Temperature-Regulating Materials

For patients dealing with chemotherapy hot flashes, tamoxifen night sweats, or radiation-related heat sensitivity, mattress materials that regulate temperature are not a luxury but a necessity. The most effective temperature-regulating materials include:

• Wool: Naturally wicks moisture, regulates temperature in both warm and cool conditions, and resists dust mites
• Silk: Provides a cool, smooth sleeping surface that does not retain heat
• Innerspring coils: Allow continuous airflow through the mattress interior, preventing heat buildup
• Natural latex: Breathes better than synthetic foam while providing pressure relief

Pressure Relief Without Heat Retention

Many cancer patients need pressure relief to manage surgical pain, joint pain, and skin sensitivity. Traditional memory foam provides excellent pressure relief but retains heat, which is counterproductive for patients dealing with hot flashes and night sweats. The ideal solution is a comfort layer that contours to the body without trapping heat. Natural materials and responsive coil systems achieve this balance better than solid foam constructions.

Motion Isolation

Individually wrapped coil systems provide significantly better motion isolation than connected coil designs. Each coil responds independently to pressure, so when one person moves, the motion is not transmitted across the entire mattress. This feature is especially important for cancer patients whose partners may inadvertently cause pain by moving during the night, or whose own restless nights would otherwise disturb a sleeping partner.

Edge Support

Strong edge support matters for cancer patients for practical reasons. Getting in and out of bed can be difficult after surgery, and sitting on the edge of the bed (for example, while managing drains, taking medications, or simply gathering energy to stand) requires a stable, supportive edge that does not collapse or roll.

Durability for Long-Term Treatment

With hormone therapy lasting five to ten years, the mattress selected during early treatment needs to maintain its performance over time. High coil counts, quality steel, and durable comfort materials resist the sagging and body impression formation that degrades sleep quality over time. A mattress that holds its shape and support for the duration of hormone therapy avoids the expense and disruption of premature replacement.

Restonic Mattress Recommendations for Cancer Recovery

At Mattress Miracle, we carry Restonic mattresses that address the specific needs of breast cancer patients at different stages of treatment and recovery. Each model offers a distinct combination of features that align with the challenges described throughout this guide.

Restonic ComfortCare Queen - $1,619

The ComfortCare provides solid, reliable support with 1,222 individually wrapped coils. Its high coil count creates a responsive sleep surface that adapts to body position changes throughout the night, which is particularly useful during the restless early weeks of recovery. The coil-based design allows natural airflow through the mattress, and the individually wrapped construction provides good motion isolation for couples. This is a strong choice for patients seeking dependable support at a moderate price point, especially those whose primary challenges are positional discomfort and partner disturbance rather than severe temperature regulation needs.

Restonic Luxury Silk and Wool Queen - $1,395

For breast cancer patients dealing with chemotherapy hot flashes, tamoxifen night sweats, or radiation skin sensitivity, the Luxury Silk and Wool is the standout choice. The combination of natural silk and wool in the comfort layers provides outstanding temperature regulation and moisture management. Silk offers a cool, smooth surface that feels gentle against sensitive or radiated skin. Wool wicks moisture efficiently, helping manage the drenching night sweats that accompany hormone therapy.

The 884 zoned coils provide targeted support that reduces shoulder pressure (important for post-surgical comfort and lymphedema management) while maintaining proper spinal alignment. The zoned design is particularly effective for patients who need to sleep in modified positions during recovery, as it adapts to different body configurations rather than providing uniform resistance.

Dorothy, Sleep Specialist at Mattress Miracle, notes: "We have seen many customers going through cancer treatment who come in specifically because they are struggling with night sweats. The Luxury Silk and Wool consistently gets the best feedback from these customers. The natural fibre combination genuinely makes a difference in temperature comfort, and the zoned coils are wonderful for patients who need extra cushioning in the shoulder area after surgery."

Restonic Revive Reflections Euro Top Queen - $1,395

The Revive Reflections Euro Top combines 1,200 coils with a plush Euro top comfort layer that excels at pressure point relief. The Euro top design adds an extra layer of cushioning that is sewn flush to the mattress surface, creating a smooth, even sleeping surface without gaps or edges that can create pressure ridges.

This mattress is particularly well-suited for patients dealing with post-surgical pain, reconstruction recovery, or aromatase inhibitor joint pain. The generous comfort layer cushions bony prominences (shoulders, hips, elbows, heels) that become more prominent during treatment-related weight changes, and the high coil count provides the underlying support needed to maintain proper alignment.

Creating a Healing Sleep Environment

The mattress is the foundation of a good sleep environment, but other factors contribute significantly to sleep quality during cancer treatment. Consider these adjustments alongside your mattress choice.

Temperature Control

Keep your bedroom temperature between 18 and 20 degrees Celsius (65 to 68 degrees Fahrenheit). For patients experiencing hot flashes, the lower end of this range is generally better. A bedroom fan provides both air circulation and white noise, which can mask the sounds that trigger light-sleep awakenings. Consider keeping a glass of cool water on the nightstand and a change of nightclothes nearby for nights when sweating is particularly heavy.

Bedding Selection

Pair your mattress with breathable, moisture-wicking bedding. Natural fibre sheets (cotton, bamboo, or linen) breathe better than synthetic materials. Avoid heavy duvets that trap heat; instead, use layers that can be easily added or removed as body temperature fluctuates. For patients with radiation skin sensitivity, choose the softest, smoothest fabrics available for direct skin contact.

Lighting and Electronics

Light exposure suppresses melatonin production, which is already compromised during cancer treatment. Use blackout curtains to eliminate exterior light, and avoid screens (phones, tablets, televisions) for at least 30 minutes before bed. If you wake during the night and need light for bathroom trips or medication management, use a dim, warm-toned nightlight rather than overhead lighting.

Pain Management Timing

Work with your medical team to time pain medications so that their peak effectiveness coincides with your sleep period. This may mean taking certain medications 30 to 60 minutes before bed rather than at a standard time. Similarly, if anti-nausea medication helps you sleep better, discuss bedtime dosing with your oncologist.

Relaxation Techniques

Progressive muscle relaxation, deep breathing exercises, and guided meditation can help quiet the anxiety that keeps many cancer patients awake. Several free apps and online programs offer cancer-specific relaxation content. Practise these techniques in bed, on your supportive mattress, allowing the physical comfort of the sleep surface to complement the mental relaxation of the exercises.

Sleep Hygiene During Treatment

Treatment-related fatigue tempts many patients to nap frequently and at irregular times, but this can worsen nighttime insomnia. While short naps (20 to 30 minutes, before 2 p.m.) can be restorative, longer or later naps reduce sleep pressure and make it harder to fall asleep at night. Maintaining a consistent sleep and wake schedule, even on treatment days when fatigue is most intense, helps regulate the body's circadian rhythm and improve overall sleep quality.

Local Support for Cancer Patients in Brantford

Brantford Cancer Support Resources

The Brantford community offers several resources for cancer patients beyond mattress selection. The Brant County Health Unit, local cancer support groups, and the Canadian Cancer Society's community services all provide assistance. The Grand River Hospital in nearby Kitchener and the Juravinski Cancer Centre in Hamilton are major regional cancer treatment centres serving Brantford-area patients.

Sleep disruption during cancer treatment is not something you have to manage alone. Your oncology team, your local cancer support resources, and the team at Mattress Miracle can all contribute to improving your sleep quality during and after treatment.

Visit Us

If you or a loved one is going through breast cancer treatment and struggling with sleep, we welcome you to visit our showroom. You can try each mattress at your own pace, discuss your specific needs with our team, and make an informed choice about the right sleep surface for your recovery.

Mattress Miracle
441 1/2 West Street, Brantford, ON N3R 3V9
Phone: (519) 770-0001
Hours: Monday to Wednesday 10 a.m. to 6 p.m. | Thursday and Friday 10 a.m. to 7 p.m. | Saturday 10 a.m. to 5 p.m. | Sunday 12 p.m. to 4 p.m.

Related Reading

• Chronic Pain and Sleep: Mattress Guide for Canadians
• Hot Flashes and Night Sweats: Choosing the Right Mattress
• Post-Surgery Recovery Sleep: Best Mattress for Healing
• Anxiety and Insomnia: Mattress Guide for Better Sleep