12 Inch King Size Mattress | The Feel Most Sleepers Prefer King Mattress Hybrid | Contouring Memory Foam Comfort & Balanced Support for Back and Side Sleepers – Medium-Firm | No Fiberglass
Buy Now, Pay Later
- – 6-month term
- – No impact on credit to apply
- – Instant approval decision
- – Secure and straightforward checkout
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Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Apple Pay, and PayTomorrow. No-credit-needed leasing options through Acima may also be available at checkout.
Learn more about financing & leasing here.
90-day refund / replacement
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Features
- Customized Comfort for Every Sleeper:Whether you sleep on your side, back, or stomach, COMFBOX adapts to your body. A plush comfort layer with gel memory foam gently cradles your curves, while pocket coils provide responsive support to keep your spine aligned.
- Targeted Support Where It Matters Most:Built with zoned coils and reinforced lumbar foam, this mattress delivers extra support in the hip and lower back areas. Say goodbye to sinkage and hello to better postureand less back pain.
- Cool, Dry, and Breathable All Night:Stay cool with moisture-wicking fabrics and enhanced airflow from the individually wrapped coils. The breathable design helps regulate temperature, so you sleep fresh and dry, even on warm nights.
- Undisturbed Sleep, Even with Partners or Pets:Motion-isolating coils absorb movement across the surface, minimizing disruptions from tossing, turning, or midnight cuddles. Reinforced edge support gives you more usable spaceno sliding off the edge.
- Certified Safe + 10-Year Warranty:Made with CertiPUR-US certified foams, free from harmful chemicals. Your COMFBOX comes with a 10-year warranty and arrives vacuum-packed for easy setup. Let it fully expand within 72 hours and sleep easy knowing youre protected.
Brand: COMFBOX
Size: King
Product Dimensions: 80"L x 76"W x 12"Th
Item Weight: 74 Pounds
Item Firmness Description: Medium Firm
Top Style: Pillow Top
Cover Material: Polyester Blend Fabric
Number of Layers: 3.0
Fill Material: Gel Memory Foam, High Density Foam
Weight Limit: 600 Pounds
Product Dimensions: 80 x 76 x 12 inches
Item Weight: 74 pounds
Manufacturer: COMFBOX
Item model number: COMA3
Date First Available: January 16, 2026
Frequently asked questions
To initiate a return, please visit our Returns Center.
View our full returns policy here.
- Klarna Financing
- Affirm Pay in 4
- Affirm Financing
- Afterpay Financing
- PayTomorrow Financing
- Financing through Apple Pay
Learn more about financing & leasing here.
