Inner memory foam: Subrtex 2" gel-infused memory foam mattress topper uses 3.5 pound density memory foam, mattress topper with ventilated design optimizes air flow and reduce trapped body heat, eliminates motion transfer and relieve your body's stress. | Removable & washable cover: The bamboo rayon cover adopts skin-friendly knitted fabric, comes with adjustable elastic straps which fit mattress depth up to 12", equips with mesh fabric backing to prevent sliding and premium metal zipper for easy removal and washing. | Healthier sleep environment: Our memory foam mattress topper is certified by CertiPUR-US and OEKO-TEX for durability, performance and content. No formaldehyde, No harmful phthalates. | Advanced shipping: Before first use, leave the memory foam flatly in a well ventilated area for 48-72 hours until it's fully expanded.Tips: Low temperature may need more time, find a suitable temperature(78℉) will shorten the time. | Ten-year: We are confident with our mattress topper and we will provide peace of mind for your purchase. Buy with Confidence. If you have any issues within 10 years of your purchase, Contact us and we will find make it right.