Martha Stewart SleepComplete King Mattress - Firm Hybrid with Pocket Springs, Dual-Action Cooling, 5-Way Zoning, Coolweave Cover, 12" Mattress in a Box

Product Overview

The SleepComplete mattress measures 80 inches long by 76 inches wide by 12 inches thick in the King size, weighing approximately 125 pounds. It features a three-layer construction combining fabric, metal, and foam components. The top layer consists of a removable Jacquard cover with moisture-wicking Coolweave technology that promotes airflow. Beneath this lies cooling gel memory foam that contours to the body while dissipating heat. The support layer includes highly resilient foam for durability. The base contains 1,000 individually wrapped pocket springs arranged in five zones to provide different tension levels for various body regions. A firmer coil encasement reinforces the mattress edges. This firm model represents the manufacturer's most supportive option, though some reviewers note it feels firm but not extremely rigid. The mattress arrives compressed in a box requiring 48-72 hours to fully expand, though many users report it's ready within a day. Care involves spot cleaning the removable cover. While not portable or foldable, the bed-in-a-box delivery simplifies setup. The white color and tight or pillow-top styling options offer aesthetic versatility. Designed for adults, this hybrid mattress balances traditional spring support with modern foam comfort layers.

Design & Build

The SleepComplete mattress features a hybrid construction combining pocketed coils with multiple foam layers. Its 12-inch profile includes a removable Coolweave cover made from breathable Jacquard fabric that wicks moisture. Beneath this, the comfort layer consists of CertiPUR-US certified cooling gel memory foam that contours to the body while dissipating heat. The transition layer uses high-resilience support foam for durability. The support core contains 1,000 individually wrapped pocket springs arranged in five zones with varying tension levels. A firmer coil encasement reinforces the perimeter for edge support. The mattress weighs approximately 125 pounds in King size, with dimensions of 80"L × 76"W × 12"H. The white color and tight or pillow-top styling options provide clean aesthetics. Construction materials include fabric, metal, and foam components certified for safety and performance.

Maintenance involves spot cleaning the removable cover rather than full immersion washing. The bed-in-a-box delivery means the mattress arrives compressed in plastic wrapping. After unboxing, users should place it on a supportive foundation and allow 48-72 hours for full expansion, though many reviewers report it's ready within 24 hours. The firm edge support is designed to prevent sagging when sitting on the sides. Durability comes from the combination of high-density foams and individually wrapped coils that maintain their shape over time. The mattress is not portable or foldable once expanded. Several reviewers mention minimal off-gassing odor upon unboxing. The hybrid design aims to provide both the bounce of traditional springs and the pressure relief of modern foams in one package.

Performance

The SleepComplete mattress delivers firm support with effective cooling properties. Reviewers consistently praise the cooling technology, noting the Coolweave cover and gel-infused foam work together to prevent overheating during sleep. The 5-way zoning system provides targeted support with firmer areas for the lumbar region and softer zones for shoulders and hips. Motion isolation performs well due to individually wrapped coils that minimize transfer when partners move. Edge support receives mixed feedback—while the manufacturer claims a firmer perimeter, some reviewers note the edges sink when sitting to put on shoes. The firmness level suits back and stomach sleepers, with several users describing it as supportive yet comfortable rather than overly rigid. Pressure relief comes from the memory foam layer that contours to body curves without creating a sinking sensation.

Temperature regulation stands out as a key strength, with multiple reviewers confirming the mattress sleeps cool. The hybrid construction provides balanced support with adequate bounce for changing positions. Durability appears solid given the high weight capacity and quality materials. Some users report the mattress helps with back pain due to its firm support. Expansion occurs quickly after unboxing, though one reviewer mentioned a corner required manual adjustment to inflate properly. The mattress maintains its shape well over initial use periods. While designed as the firmest option, it offers some yielding comfort rather than feeling completely rigid. The combination of springs and foam creates a responsive surface that adapts to different sleeping positions. Overall performance meets expectations for a premium hybrid mattress at this price point.