Color: Gray Size: Twin Product Note: Due to compressed packaging, the memory foam may initially appear thin upon opening. Please allow it to fully expand to its normal thickness for 48-72 hours.Tips: Low temperature may need more time, find a suitable temperature(78 ) will shorten the time Gel Memory Foam Material: Our memory foam mattress topper readily conforms to the curves and shape of your body, distributes weight evenly to alleviate pressure points for better sleep. Increase Softness and Comfort: A comfortable and affordable way to fix a sagging mattress, soften a hard mattress, or prolong your mattress life. Instead of buying an expensive mattress, our mattress topper won t cost you an arm and a leg. Non-slip & Machine Washable cover: Use skin-friendly and breathable Polyester fiber, with elastic straps and anti-slip surface backing to prevent sliding and premium metal zipper for easy removal and washing. Certification: Our Gel memory foam topper is made of CertiPUR-US certified materials and soft cover is certificated OEKO-TEX. The memory foam topper meets or exceeds standards for content, emissions, and durability.