Capitol Bedding Suttons Bay Cushion Firm

Suttons Bay Comfort Firm

The Suttons Bay Cushion (Comfort) Firm sits right between “board hard” and “too soft,” giving you a firm, stable surface with just enough conforming at the top. Capitol pairs their heavier-density foams with a Quantum Edge® encapsulated coil system, so this feels like a proper adult support mattress that’s meant for every-night use, not an entry-level throwaway. It’s built in Grand Ledge, Michigan, with the same higher-density foam philosophy Capitol uses throughout their line.

Feel & best for

• Overall feel: firm surface with a light cushion (“cushion-firm”).

• Best for: back and stomach sleepers, and combo sleepers who prefer a firmer bed but don’t want a slab of concrete.

• Also works for: heavier side sleepers who can’t tolerate soft pillowtops but still want a bit of give at the surface.

Key construction & materials

• Quilted cover over a Milliken silica-based fire barrier for a soft, breathable surface with non-fiberglass FR protection.

• Two targeted comfort layers of 1.8 lb / 20 ILD foam (¾” and 1″) near the surface to add gentle contouring and help with spinal alignment.

• Two 1½” layers of 1.8 lb / 50 ILD convoluted foam for firmer support, added airflow, and smoother transition into the coil unit.

• Quantum Edge® encapsulated coil unit with narrower side rails and individually wrapped coils for better edge stability and reduced motion transfer across the bed.

• 1¼” high-density base foam to stabilize the coil unit and extend the usable life of the mattress.

Construction & Specs

Comfort layers

• ¾” 1.8 lb, 20 ILD polyurethane foam in the quilt.

• 1″ 1.8 lb, 20 ILD polyurethane foam directly under the quilt.

• Two 1½” layers of 1.8 lb, 50 ILD convoluted foam for firmer support and better airflow.

Support system

• Quantum Edge® wrapped coil unit (narrow-diameter perimeter coils + individually wrapped interior coils)

Base

• 1¼” high-density polyurethane support foam.

Additional notes

• All foams used are CertiPUR-US® certified.

• Handcrafted in Grand Ledge, Michigan by Capitol Bedding.

• Fully compatible with adjustable bases.

Mattress Thickness: 15″

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The Capitol Bedding Difference

For more than 50 years, Capitol Bedding has been crafting high-quality mattresses with a clear focus: durable, comfortable sleep that stands the test of time. Long before “no-flip” mattresses became the norm, Capitol committed to building one-sided designs using truly premium materials—especially high-density foams engineered to keep their feel and support for years, not just months.

That commitment led to the use of foams like P2536 (2.5 lb density, 36 ILD), P2560 (2.5 lb, 60 ILD), and P2426 (2.4 lb, 26 ILD), each chosen for a specific role in comfort and support. Instead of relying on the 1.0–1.5 lb foams commonly found in many mass-market mattresses, Capitol builds with 1.8 lb, 2.4 lb, and 2.5 lb foams that are designed to break down far more slowly and maintain their original feel much longer.

Key Benefits of Capitol’s High-Density Foam

• High-Density Foam = Longer Life
  Higher-density foams hold their shape and support significantly better over time than standard low-density foams, helping the mattress feel “new” for more years.

• Purpose-Built Foam Types

  • P2536 (2.5 lb, 36 ILD): Focused on durability and everyday support.

  • P2560 (2.5 lb, 60 ILD): Firmer, more supportive feel for heavier use and stronger lumbar support.

  • P2426 (2.4 lb, 26 ILD): Softer, more cushioning comfort where pressure relief is needed.

• Proven Firmness Retention
  Over a 10-year span, Capitol’s typical foam choices retain firmness far better than commodity foams:

  • 2.5 lb foam: about 8% firmness loss

  • 2.4 lb foam: about 9% firmness loss

  • 1.8 lb foam: about 20% firmness loss
    Compare that to lower-density foams often used elsewhere:

  • 1.2 lb foam: about 38% firmness loss

  • 1.0 lb foam: about 42% firmness loss

• Premium, U.S.-Made Materials
  Capitol sources its foams from Future Foam, a leading family-owned U.S. producer of Flexible Polyurethane Foams (FPF), chosen for consistent quality, performance, and longevity.

While these premium materials cost more to build with, Capitol Bedding believes that better foam makes better mattresses—and better mattresses make for better sleep. The result is a line of products designed to feel supportive and comfortable for years, not just in the showroom, giving you a bed that truly earns its place in your home.