Serta iComfortECO S20GL Plush Full Hybrid Mattress - Cooling, Pressure Relief, Recycled Materials, 100 Night Trial, CertiPUR-US Certified

Product Overview

This Serta iComfortECO S20GL mattress measures 74.5 inches long by 53 inches wide with a 12.5-inch thickness, weighing approximately 99 pounds in the full size. Its construction includes five distinct layers: a CoolTemp cover made with REPREVE recycled polyester, Terra Fusion Memory Foam with 28% plant-based content, EverCool Fuze Gel Memory Foam, a 1000-coil support system with 85% recycled steel, and a recycled fiber base layer. The plush firmness designation indicates a softer feel that cushions pressure points while the hybrid construction combines foam comfort with coil support. The mattress features edge support and lumbar support capabilities according to specifications. Care requires spot cleaning with water-based solutions as the cover is not removable. While currently shown in full size, Serta typically offers this model in multiple sizes. The CertiPUR-US certification ensures foam materials meet emissions and durability standards. The antimicrobial and moisture-wicking properties aim to maintain a hygienic sleep environment.

Design & Build

The Serta iComfortECO S20GL Plush features a 5-layer hybrid construction combining foam comfort layers with a coil support system. The top layer begins with a CoolTemp cover made from REPREVE polyester, which incorporates recycled plastic bottles into a breathable, cool-to-the-touch fabric. Beneath this lies Terra Fusion Memory Foam containing 28% plant-based materials, designed to provide pressure relief while reducing environmental impact. The third layer consists of EverCool Fuze Gel Memory Foam, which blends cooling gel particles with traditional memory foam to help regulate temperature. These foam layers total approximately 12.5 inches in height and work together to create a plush, contouring sleep surface that cushions pressure points.

The support core utilizes a 1000 Series 5-Zone Quad Coil system constructed with 85% recycled steel. These encased coils are arranged in five zones to provide targeted support—firmer under the back and thighs while softer around the shoulders and legs. The coil system rests on a recycled fiber base layer that provides foundational stability. The mattress features reinforced edges to maximize usable sleep surface and prevent roll-off. While the cover is not removable for washing, it features antimicrobial treatment and moisture-wicking properties. The entire construction meets CertiPUR-US standards for foam content, ensuring low VOC emissions and durability. At 99 pounds for the full size, the mattress requires two people for movement and setup.

Performance

The plush firmness of the iComfortECO S20GL provides noticeable pressure relief, particularly for side sleepers and those with joint sensitivity. The combination of plant-based memory foam and gel-infused foam creates a gradual sink-in feel that contours to body shapes without excessive hug. Reviewers describe the mattress as very comfortable with adequate support for most sleep positions. The cooling technologies work together to maintain a more temperature-neutral sleep surface—the CoolTemp cover feels initially cool to the touch while the gel memory foam helps dissipate body heat. The hybrid design promotes airflow through the coil system, reducing heat retention compared to all-foam mattresses. Motion isolation from the foam layers and encased coils helps minimize sleep disturbance when partners move.

Edge support allows sleepers to utilize the full mattress surface without significant roll-off. The 5-zone coil system provides differentiated support that aligns the spine in various sleeping positions. However, one reviewer reported developing squeaks after several months of use, suggesting potential durability concerns with the coil system. The plush feel may not provide sufficient support for heavier individuals or those preferring firmer surfaces. The non-removable cover requires careful spot cleaning to maintain hygiene. While the mattress aims to balance comfort and support, individual experiences vary based on body weight, sleep position, and personal preferences. The 100-night trial period allows sleepers to test the mattress in their own home before making a final decision.