[COMFORT AND SUPPORT]-Ferlizer double-layer memory foam topper offers two firmness options, medium firm feel and medium feel, balance comfort and support (CertiPUR-US Certified) [LIGHT SLEEP FRIENDLY]-Ferlizer selected memory foam offers the even contouring, pressure relief, and excellent motion isolation, and breathable rayon fabric from bamboo gives a cooling and comfortable feel while you sleep, perfect for light sleeping couples [ULTRA SOFT COVER]-Each corner of the breathable & soft bamboo cover has an adjustable strap, fits your mattress up to 18“ and keeps mattress topper stay securely in place (OEKO-TEX 17.HCN.13316 HOHENSTEIN HTTI) [VACUUM PACKAGING]-Allow 48-72 hours to fully expand the new foam topper in a well ventilated area and a suitable temperature (78℉), low temperature may take more time [DORMITORY ESSENTIALS]-A twin xl size mattress topper is a crucial item for dormitories. The cover of Ferlizer's mattress topper is machine washable, tumble dry low for easy maintenance. Ferlizer 4" [Twin XL] Mattress Topper, Memory Foam Mattress Topper Twin Extra Long for College Dorm with Ultra Soft Cover & Corner Straps, CertiPUR-US Certified