All Season Reversible Hypoallergenic Cooling Mattress Topper B035951342" 100% Gel Memory Foam adds an instant layer of comfort to your mattress (60% polyester, 40% cooling fiber polytene) Cooling Gel provides optimal temperature control and sleeping comfort Pressure relieving comfort relaxes muscles Naturally Antimicrobial & Hypoallergenic Cover with zipper features a unique fabrication that is always "cool to the touch" Anti Slip reverse side of cover keeps the topper well in place Oeko Tex Certified, includes no