Costco sells king mattresses at competitive prices, but the coil counts often tell a different story. Mattress Miracle at 441½ West Street in Brantford encourages customers to compare specifications, not just price tags. Many Costco king mattresses have 800 to 900 coils. The Restonic ComfortCare King at Mattress Miracle has 1,440 coils at $2,051. More coils means more precise support and better motion isolation. Brad invites customers to feel the difference on the showroom floor. Call (519) 770-0001.
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."
What's in This Guide
Why Coil Count Matters More in a King
Thinking about a king mattress from Costco? Here is the question most shoppers never ask: how many coils are actually supporting you across that 76" x 80" surface?
A king mattress has 6,080 square inches of sleeping surface. That is 42% more area than a queen (4,260 square inches). When a manufacturer puts 850 coils in a king, each coil is responsible for about 7.15 square inches. When Restonic puts 1,440 coils in their ComfortCare king, each coil covers just 4.22 square inches.
The difference is not academic. With two adults sharing a king, you need coils that respond independently to different body weights, sleeping positions, and movement patterns. Fewer coils means larger dead zones between springs, less precise contouring, and faster wear in high-pressure areas like hips and shoulders.
The Math on King Mattress Coils
Costco king (850 coils): 1 coil per 7.15 square inches. Each coil supports a larger area, creating less precise body contouring.
Restonic ComfortCare king (1,440 coils): 1 coil per 4.22 square inches. Nearly 70% more support points, with each coil responding independently to pressure.
Brad at Mattress Miracle puts it simply: "A king is the one size where coil count really separates good from great. You have two people on the biggest mattress available. Every coil matters."
What Costco Sells in King Size
Costco carries king mattresses from the three SSS brands: Serta, Sealy, and Simmons (Beautyrest). These are cost-engineered exclusive SKUs made specifically for warehouse retail. They are not the same models you would find at a traditional mattress store.
What you will typically find at Costco:
- Coil counts: 800 to 850 for innerspring models
- Construction: Machine-assembled with adhesive bonding
- Materials: Primarily synthetic foams
- Price range: $800 to $1,500 for king size
- Selection help: No fitting, no expert guidance
- Delivery: Self-transport from warehouse or basic drop-off
These are functional mattresses. They are not bad products. But when you are spending $1,000 or more on a king that two adults will sleep on every night for years, the construction details matter.
The Restonic King Lineup at Mattress Miracle
Every Restonic mattress at Mattress Miracle is Canadian-made. The king sizes start at $1,455 and go up to $3,995 for the flagship model. Here is what each one offers:
Restonic ComfortCare King: $2,051
1,440 individually wrapped pocket coils. TempaGel cooling, SuperEdge Plus foam encasement, Marvelous Middle zoned lumbar support. Euro Top available in Dalton (Firm) or Albany (Plush). Split Comfort option lets one half be firm while the other is plush.
Revive Reflections King: $2,895
Flippable dual-sided design. 1,200 Posturized Pocket Coils, triple cooling (copper-infused fabric + Joma Wool + gel memory foam), hand-tufted construction. Flip between firm and plush depending on the season or your preference.
Luxury Silk and Wool King: $2,895
884 zoned pocket coils with natural silk and wool. Flippable dual-sided, TempaGel cooling, hypoallergenic natural materials. For those who prioritize natural construction over synthetic foams.
Revive Tiffany Rose / Jasmine King: $3,500
1,188 coils with Talalay Copper Latex. 13-inch profile, 3-zone pocket coil core, wool blend quilt, true hand-tufted construction. Tiffany Rose (Firm) or Jasmine (Plush), with split comfort available.
Revive St Charles / Elizabeth King: $3,995 (Flagship)
1,188 coils, 15-inch Euro Top profile. The tallest, most premium mattress in the Restonic lineup. Talalay Copper Latex, natural wool fibre quilt, full foam encasement, true hand-tufted construction. Maximum comfort layering.
Full Comparison Table
| Feature | Costco King (Typical) | Restonic ComfortCare King |
|---|---|---|
| Coil Count | 800 to 850 | 1,440 |
| Coil Type | Bonnell or basic pocket coil | Marvelous Middle Zoned Pocket Coils |
| Construction | Machine-assembled, adhesive | Hand-tufted (ribbons bind layers) |
| Edge Support | Basic foam border | SuperEdge Plus full perimeter encasement |
| Cooling | Gel foam layer | TempaGel gel-infused memory foam |
| Made In | Varies (often overseas) | Canada |
| Split Comfort | Not available | Available (Firm/Plush halves) |
| Expert Fitting | No (warehouse self-serve) | Yes (Brad, Dorothy, Talia) |
| Delivery | Self-transport or basic delivery | White glove delivery and setup |
| Price | $800 to $1,500 | $1,455 |
| Expected Lifespan | 5 to 7 years | 10 to 15 years |
↔ Scroll to see full table
Split Comfort: The King Advantage
Here is something Costco cannot offer: split comfort. Most Restonic king mattresses at Mattress Miracle can be built with firm on one side and plush on the other. Same mattress, two firmness levels, no gap down the middle.
Dorothy at Mattress Miracle explains why this matters: "Couples almost never agree on firmness. One person wants firm for back support, the other wants plush for side sleeping. With split comfort, you both get what you need without buying two separate mattresses."
This is especially valuable in a king because the wider surface gives each person their own distinct comfort zone. The individually wrapped pocket coils prevent motion transfer between sides, so movement on one half does not disturb the other.
King Mattress Delivery
A king mattress is heavy and awkward. Getting one home from Costco means either borrowing a truck, renting a van, or paying for basic delivery that drops it at your door.
Mattress Miracle offers white glove delivery throughout the Brantford area and a 2-hour radius. That means delivery directly to your bedroom, setup on your frame, and removal of your old mattress. For a king size, this is not a luxury. It is a necessity.
Delivery coverage includes Hamilton, Burlington, Mississauga, Toronto, Kitchener, Waterloo, Guelph, Cambridge, St. Catharines, Niagara Falls, London, Barrie, Oshawa, and everywhere in between.
The King Size Bottom Line
A king mattress is the biggest investment in your sleep. Two adults, 6,080 square inches of surface, every night for the next decade. The difference between 850 coils and 1,440 coils is the difference between adequate support and precise, body-conforming support that lasts.
At $2,051, the Restonic ComfortCare king costs about the same as a mid-range Costco king, but gives you nearly double the coils, Canadian-made construction, hand-tufted durability, and the option for split comfort. And you get to try it in the showroom first.
Try a 1,440-Coil King in Person
Come to the Mattress Miracle showroom and feel what 1,440 individually wrapped pocket coils actually feels like under two people. Brad, Dorothy, and Talia will help you find the right firmness for both of you.
Mattress Miracle
441 1/2 West Street, Brantford, Ontario N3R 3V9
mattressmiracle.ca
Mon-Wed: 10 a.m. - 6 p.m. | Thu-Fri: 10 a.m. - 7 p.m.
Sat: 10 a.m. - 5 p.m. | Sun: 12 p.m. - 4 p.m.
White glove delivery throughout Southern Ontario
Frequently Asked Questions
How many coils does a Costco king mattress have?
Most Costco king mattresses from brands like Serta, Sealy, and Beautyrest have between 800 and 850 coils. The Restonic ComfortCare king at Mattress Miracle has 1,440 individually wrapped pocket coils, nearly double the support for the same price range.
How much does a king mattress cost at Costco vs Mattress Miracle?
Costco king mattresses typically range from $800 to $1,500. The Restonic ComfortCare king starts at $2,051 with 1,440 pocket coils, hand-tufted construction, and Canadian-made quality. Premium Restonic kings go up to $3,995 for the flagship St Charles model.
Why do king mattresses need more coils than other sizes?
A king mattress has 42% more surface area than a queen. Without proportionally more coils, each coil supports a larger area, creating uneven support and faster sagging. The Restonic ComfortCare king uses 1,440 coils to maintain consistent support across the entire sleeping surface.
Does Mattress Miracle deliver king mattresses?
Yes. Mattress Miracle offers white glove delivery for king mattresses throughout the Brantford area and a 2-hour radius including Hamilton, Burlington, Mississauga, Toronto, Kitchener, Waterloo, Guelph, Cambridge, St. Catharines, London, and everywhere in between.
Can I get a split comfort king mattress?
Yes. Most Restonic models at Mattress Miracle offer split comfort, meaning one half of the king mattress can be firm while the other half is plush. This is ideal for couples who disagree on firmness. Brad and Dorothy can walk you through the options in the showroom.
What is the best king mattress in Canada?
The Restonic ComfortCare king with 1,440 pocket coils at $2,051 offers the best value. For premium buyers, the Restonic Revive St Charles king at $3,995 features hand-tufted construction, Talalay Copper Latex, and natural wool. Both are Canadian-made and available at Mattress Miracle in Brantford.
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
Our team has 38 years of experience helping customers find the right sleep solution. Call ahead or walk in any day of the week.
Sources
- Jacobson BH, Boolani A, Smith DB. Changes in back pain, sleep quality, and perceived stress after introduction of new bedding systems. J Chiropr Med. 2009;8(1):1-8. DOI: 10.1016/j.jcm.2008.09.002
- Radwan A, Fess P, James D, et al. Effect of different mattress designs on promoting sleep quality, pain reduction, and spinal alignment in adults with or without back pain. Sleep Health. 2015;1(4):257-267. DOI: 10.1016/j.sleh.2015.08.001
- Kovacs FM, Abraira V, Peña A, et al. Effect of firmness of mattress on chronic non-specific low-back pain: randomised, double-blind, controlled, multicentre trial. Lancet. 2003;362(9396):1599-1604. DOI: 10.1016/S0140-6736(03)14792-7
8 min read
Visit Our Brantford Showroom
We are located at 441 1/2 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 -- 441 1/2 West Street, Brantford, ON -- (519) 770-0001
Hours: Monday-Wednesday 10am-6pm, Thursday-Friday 10am-7pm, Saturday 10am-5pm, Sunday 12pm-4pm.
Come in and let our team help you find the right mattress for your needs. No pressure, no commission.
Shop: King Mattresses at Mattress Miracle
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 519-770-0001