Gel memory foam - Foam is infused with a cooling gel that keeps all of the positive properties of memory foam while mitigating temperature issues. CertiPUR-US Certified. Flex support foam base -This high-grade foam completes the bottom provides long-lasting durability and support to its top layer of gel memory foam, to keep the sleeper’s muscles relaxed. Fiberglass-Free FR inner cover - 92% Cotton, 8% Polyester, provides a safe, effective flame retardant layer around memory foam, without the negative aspects of fiberglass and other fire-retardant chemicals. No skin irritation, no breathing problems, and no health risks for you and your family.