Twin Gel Memory Foam Mattress TwelveInch CertipurUSSleep cooler, wake refreshed. This 12 inch twin gel memory foam mattress blends advanced cooling technology with contouring memory foam to keep you comfortable, dry, and supported all night long. Cool, breathable surface A cool touch nylon cover blended with 30% plant infused fiber wicks moisture and dissipates heat, while NanoGEL memory foam enhances airflow for a consistently fresh sleep surface. Ergonomic, pressure relieving support A 3 layer foam