Signature Design by Ashley King Size Cool Max 12 Inch Medium Plush Cooling Gel Infused Memory Foam Mattress - Pressure Relief, Fiberglass Free, Mattress in a Box

Product Overview

This mattress measures 79.5 inches long by 76 inches wide by 12 inches thick, making it a standard king size compatible with most king bed frames. The construction features gel-infused memory foam layers designed for pressure relief and temperature regulation, atop a support foam core that reduces motion transfer. The manufacturer states it has a medium-plush feel, which reviewers confirm provides noticeable softness while maintaining adequate support for most sleepers. It weighs 77.5 pounds and arrives compressed in a box, requiring unboxing, unrolling, and allowing 48-72 hours for full expansion and any packaging odors to dissipate. Care instructions specify hand washing only, and assembly involves simply placing the mattress on a suitable foundation. The mattress is fiberglass-free and uses CertiPUR-US certified foams tested for emissions, content, and durability. While the manufacturer mentions a 10-year limited warranty, specific terms are not detailed in the provided data. Reviewers note the mattress works well for side sleepers and those with shoulder or back pain, though some report edge support could be improved. The product appears under model number M43341 and is manufactured by Ashley Furniture Industries.

Design & Build

The Signature Design by Ashley mattress features a 12-inch profile constructed with layered foams. The top layers consist of gel-infused memory foam designed to contour to the body, provide pressure relief, and help dissipate heat. Beneath this, a support foam core adds stability and reduces motion transfer, which reviewers note minimizes disturbance when a partner moves. The mattress is fiberglass-free and uses CertiPUR-US certified materials, ensuring the foams meet standards for emissions, content, and durability. The cover and internal materials are designed for hand wash care only, though specific fabric details are not provided. Aesthetics are typical of bed-in-a-box mattresses, with a simple, neutral cover that fits standard king sheets. The mattress arrives compressed and rolled in a box, making it manageable for one person to move and set up, though its 77.5-pound weight requires some effort.

Setup involves unboxing, cutting the protective wrap, unrolling the mattress, and allowing it to expand. The manufacturer states it expands quickly and is safe to sleep on immediately, though full expansion and any residual odors from packaging may take up to 72 hours depending on room temperature, humidity, and ventilation. Reviewers report minimal to no smell upon unboxing and near-immediate expansion to the advertised 12-inch depth. The mattress lacks handles or integrated grips, so repositioning on a bed frame may require lifting from the sides. Durability appears promising, with one reviewer mentioning a similar model lasting four years with a heavy sleeper and showing little wear. The design prioritizes ease of delivery and setup, though some users note the edges could be firmer for sitting or getting in and out of bed.

Performance

Reviewers highlight the mattress's comfort and support, particularly for side sleepers and those with pressure points. Many describe it as offering a medium-plush feel that cushions shoulders and hips without feeling too soft or too firm. One side sleeper reported reduced shoulder soreness and fewer nighttime turns after switching to this mattress. The gel-infused memory foam helps with temperature regulation, though specific cooling performance metrics are not provided. Motion isolation is effective, with users noting minimal disturbance from a partner's movements, contributing to uninterrupted sleep. The mattress also appears to aid in reducing back pain and snoring for some couples, as mentioned in reviews. However, edge support receives mixed feedback; some users find it adequate, while others report significant sinkage when sitting on the edges, which could affect usability for getting in and out of bed.

In terms of longevity, early indications suggest good durability, with one user noting a similar model remained like new after four years of use by a heavy sleeper. The mattress maintains its shape and support over initial months, though long-term performance beyond a few years is uncertain from the available data. It fits standard king bed frames without issues, and its 12-inch height works with most fitted sheets. The bed-in-a-box format performs as expected, with quick expansion and easy setup, though users should allow up to 72 hours for any odors to dissipate fully. Weight distribution is even for most sleepers, but very heavy individuals or those preferring a firmer feel might find it too soft. Overall, the mattress delivers on its promise of pressure relief and comfort at a value price point, though edge support could be a limitation for some users.