Quick Answer: A mattress is good for side sleepers if it provides enough give at the shoulder and hip to allow those areas to sink slightly into the comfort layer while keeping the waist supported, maintains the spine in a straight lateral line, and does not create numbness or pressure buildup at the shoulder after an hour. For most side sleepers, this means a medium to medium-soft comfort layer paired with a supportive base, either coils or a firm foam foundation.
Brad, Owner, 40+ years of experience: "We have been helping Brantford families sleep better since 1997. Every customer gets personal attention, honest advice, and the kind of follow-up service you just do not get from big box stores."
In This Guide
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Side sleeping is the most common sleep position, but it creates specific demands that not every mattress is designed to meet. A mattress that works well for a back sleeper may create uncomfortable pressure at the shoulder and hip for a side sleeper, and a mattress that is too soft may fail to keep the spine in a straight lateral line. Knowing whether a mattress is suited to side sleeping requires understanding what the position actually needs from the mattress surface and support system.
What Side Sleeping Requires From a Mattress
When you sleep on your side, your shoulder and hip are the widest parts of your body and create the two main contact points with the mattress. Between them, the waist is narrower, creating a gap between your body and the mattress surface if the mattress does not contour sufficiently. A mattress that is too firm for your body weight will not allow the shoulder and hip to sink appropriately, pushing the spine upward into a lateral curve and creating pressure at the points of contact.
The result of a mattress that is too firm for side sleeping is typically shoulder pain, hip soreness, or a feeling of needing to reposition frequently during the night. Over time, sustained pressure at the shoulder can cause tingling or numbness in the arm. These symptoms are distinct from mattress-related back pain, which follows a different pattern, and often resolve quickly when the sleeper moves to a more suitable surface.
A mattress that is too soft for side sleeping creates the opposite problem. If the comfort layer allows the shoulder and hip to sink too deeply, the spine will curve in the opposite direction, sagging downward rather than maintaining a neutral position. Very soft mattresses can also make it difficult to change positions during the night, which becomes particularly problematic for anyone who wakes frequently.
Spinal Alignment in Side Sleeping
Research published in the Journal of Physical Therapy Science examined spinal alignment across sleep positions and mattress firmness levels. The study found that side sleepers had the widest variation in spinal alignment based on mattress surface characteristics compared to back or stomach sleepers. Specifically, the shoulder-to-hip width ratio of the individual sleeper, combined with the softness of the comfort layer, determined whether the spine maintained a neutral lateral position or curved in either direction. The study concluded that side sleepers benefit most from mattresses with adaptive comfort layers that respond differentially to different pressure points rather than providing uniform resistance across the surface.
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How to Assess a Mattress for Side Sleeping
If you are testing a mattress in a showroom, lie on your side in your natural sleep position for at least 10 to 15 minutes before making any assessment. Your body needs time to settle into the mattress surface, and your initial impression in the first 30 seconds is rarely accurate. While lying on your side, try to observe whether your spine feels straight from your neck to your tailbone. Ask a companion to look from behind and check whether your spine appears lateral and level, or whether it curves upward at the hip or downward at the waist.
If you are assessing without a companion, pay attention to your shoulder. A mattress that is too firm for side sleeping will create noticeable pressure buildup at the shoulder within 5 to 10 minutes of lying on it. This is not the mild sensation of a new surface, but a distinct point of pressure that does not diminish as you relax into the mattress. Any mattress that creates shoulder pressure during a short in-store test will be significantly worse after several hours of sleep.
At our West Street showroom, Brad encourages customers who are side sleepers to spend genuinely unhurried time on each mattress option. There is no time pressure, and we specifically want side sleepers to test for shoulder pressure and hip sink before committing to any model. Our Restonic ComfortCare Queen, with its 1,222 individually pocketed coils and zoned comfort layer, is one of the options we frequently recommend to side sleepers in the mid-range, as the pocketed coil system allows independent response at the shoulder versus the hip.
The Pillow Factor for Side Sleepers
A mattress assessment for side sleepers should always be done with the pillow you actually use, or at minimum with a pillow of similar thickness. The height of your pillow determines the angle of your neck relative to your spine, and a very low pillow on a very soft mattress, or a very thick pillow on a firm mattress, can create neck strain that you might incorrectly attribute to the mattress. For side sleepers, the pillow and mattress work as a system, and changing one without considering the other often produces unsatisfying results. A pillow that fills the distance between your shoulder and ear without pushing your head up or allowing it to drop is the target.
How Body Weight Changes the Equation
Body weight is a critical variable for side sleepers. A lighter person, under 65 kg, typically does not generate enough downward force to engage a medium-firm comfort layer adequately. The result is that they remain on top of the surface rather than sinking to a depth where pressure is distributed. Lighter side sleepers often do better on softer comfort layers than the general guidance for side sleepers suggests.
Heavier side sleepers, over 90 kg, tend to sink through soft comfort layers more quickly, which can lead to the spine curving downward rather than remaining neutral. Heavier side sleepers generally need a firmer comfort layer than the general guidance suggests, with a robust underlying support system that prevents excessive total sink depth. A pocketed coil system is particularly useful here because the individually wrapped coils can be engineered to have different compression rates in different zones of the mattress, providing more pushback at the hip without sacrificing shoulder pressure relief.
Side Sleeper Mattresses in Brantford
Since 1997, Brad and the Mattress Miracle team have helped Brantford residents who are side sleepers find mattresses matched to their specific body weight and shoulder width. Side sleeping needs are among the most nuanced to address because the ideal firmness varies significantly between a 55 kg person and a 95 kg person, even when both sleep in the same position. Come to our West Street showroom and we will walk you through exactly which options are designed for your specific combination of sleep position and body characteristics.
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Find Your Perfect Mattress at Mattress Miracle
We are a family-owned mattress store in Brantford, helping our community sleep better since 1997. Come try mattresses in person and get honest, no-pressure advice.
441 1/2 West Street, Brantford, Ontario
Call 519-770-0001Frequently Asked Questions
Should side sleepers use a softer mattress?
Generally yes, relative to back sleepers, but the specific firmness level depends heavily on body weight. Lighter side sleepers, under 65 kg, typically benefit from a soft to medium-soft comfort layer. Average weight side sleepers, 65 to 90 kg, typically do best with a medium comfort layer. Heavier side sleepers, over 90 kg, often find that medium to medium-firm is the right balance. The goal in all cases is sufficient give at the shoulder and hip without allowing the spine to curve downward at the waist.
Can a hybrid mattress work well for side sleepers?
Yes, and hybrid mattresses are often an excellent choice for side sleepers. The pocketed coil support layer allows independent compression at the shoulder and hip, which means each area can sink to the appropriate depth based on the pressure it generates. The comfort layer above can be foam or latex, providing the contouring needed for pressure relief. Hybrid mattresses with individually pocketed coils and a comfort layer of 5 to 8 cm thick tend to give side sleepers the best combination of pressure relief and spinal support.
Is memory foam good for side sleepers?
Memory foam can be good for side sleepers, particularly for pressure relief at the shoulder and hip. The main limitation is temperature regulation, as dense memory foam tends to retain body heat, which can be uncomfortable for warmer sleepers. Memory foam also responds slowly to position changes, which some side sleepers who move frequently during the night find inconvenient. If you sleep cool and do not change positions frequently, memory foam can be an effective option for side sleeping. Gel-infused memory foam addresses the temperature issue partially but does not eliminate it entirely.
My shoulder aches in the morning. Is my mattress the cause?
Shoulder pain that is present when you wake and improves within 30 minutes of getting up is a strong indicator that the mattress is contributing. Shoulder pain that is constant throughout the day, or that worsens with activity rather than improving, is more likely to be a musculoskeletal issue unrelated to the mattress. If your shoulder pain follows the morning pattern and your mattress is more than five years old or shows signs of wear, a mattress assessment is a reasonable first step before pursuing other interventions.
Sources
- Radwan, A., Fess, P., James, D., Murphy, J., Myers, J., Rooney, M., Taylor, J., & Torii, A. (2015). Effect of different mattress designs on promoting sleep quality, pain reduction, and spinal alignment in adults with or without back pain. Sleep Health, 1(4), 257-267. doi.org/10.1016/j.sleh.2015.08.001
- Defloor, T. (2000). The effect of position and mattress on interface pressure. Applied Nursing Research, 13(1), 2-11. doi.org/10.1016/S0897-1897(00)80013-4
- Jacobson, B.H., Boolani, A., & Smith, D.B. (2009). Changes in back pain, sleep quality, and perceived stress after introduction of new bedding systems. Journal of Chiropractic Medicine, 8(1), 1-8. doi.org/10.1016/j.jcm.2008.09.002
- Okamoto-Mizuno, K., & Mizuno, K. (2012). Effects of thermal environment on sleep and circadian rhythm. Journal of Physiological Anthropology, 31(1), 14. doi.org/10.1186/1880-6805-31-14
Visit Our Brantford Showroom
Mattress Miracle
441 1/2 West Street, Brantford
Phone: (519) 770-0001
Hours: Mon-Wed 10-6, Thu-Fri 10-7, Sat 10-5, Sun 12-4
Side sleeper? Tell Brad or Dorothy when you come in, and they will take you directly to the options that provide the right shoulder and hip pressure relief for your body weight. Take as long as you need on each mattress.
Visit Our Brantford Showroom
We are located at 441½ West Street in downtown Brantford. Free parking available. Our team does not work on commission, so you get honest advice based on your needs.
Mattress Miracle , 441½ West Street, Brantford, ON · (519) 770-0001
Hours: Monday–Wednesday 10am–6pm, Thursday–Friday 10am–7pm, Saturday 10am–5pm, Sunday 12pm–4pm.