Perfect Sleeper® Cobalt Calm Extra Firm Mattress

Featuring an 825-coil density system, this classic quilted-top mattress offers zoned comfort, pressure relief, and memory foams that contour your body—plus upgrades available with more cooling layers and support.

An extra-firm, supportive mattress with a 12” profile, essential cooling features, and targeted support.

Materials & Construction

• Our celebrated mattress, the Serta Perfect Sleeper, is new and improved with a focus on what matters most: consistent, restful sleep for every type of sleeper—back, side, stomach, or snuggled up to someone else. With zoned support, contouring memory foams, and a cooling cover for comfortable sleep all night long, this mattress is your perfect sleep solution every night.
• PillowSoft® Aire Foam provides enhanced cushioning for exceptional comfort and promotes airflow through its unique, gently rippling design
• Gel foam lumbar support band provides support for the lower back and hips
• 825-coil density system provides contouring, cradling support that minimizes motion transfer, plus an extra-deep foam rail helps reduce edge roll-off and extends the sleep surface
• 100% USA Assembled

Responsibly crafted

• CertiPUR-US® Certified means our foam was tested for and is free from harmful chemicals and gasses

Care

• To protect your mattress from stains and spills, we highly recommend using a mattress protector; This will also help with the overall health and lifespan of your mattress.
• We do not recommend applying liquids to the product; Applying liquids may stain the fabric and make the soiled area worse; Moisture or chemicals applied directly to the mattress can cause premature breakdown of the foam and damage the product.
• We suggest applying baking soda to the soiled area, let stand about 15 minutes, vacuum, and repeat as needed; Air the product out as much as possible.

Compatibility

• Compatible with most frames, including: traditional frames, box springs, platform frames, slatted frames, bunky boards, and adjustable frames.

Support

3 zones of cushioning, cradling support with an 850-coil density system

Pressure Relief

Contouring memory foams help relieve aches and pains

Cooling

Topped with a cool-to-the-touch cover made with CoolFeel™️ fabric

Motion Control

Designed to minimize the impact of your partner's movement

Made for

Best for stomach and back sleepers

1. PillowSoft® Aire

Soft foam provides enhanced cushioning for exceptional comfort and promotes airflow through its unique, gently rippling design

2. Serta® Support Foam

Strikes the ideal balance of cushioning and support

3. Gel Band Support

Gel foam lumbar support band provides support for the lower back and hips

4. 825 Edition Custom Support System

An 825-coil density system that provides contouring, cradling support and minimizes motion transfer

5. Serta® Balanced Support Foam

Strikes the ideal balance of cushioning and support, no matter how firm or plush you prefer your mattress