Hybrid Design for Comfort -- Inofia Twin XL mattress combines the support of traditional innerspring coils with the comfort of gel memory foam, offering a supportive yet comfortable sleep experience. Motion Isolation -- Individually wrapped pocketed coils in the 12 inch twin xl mattress help isolate motion, preventing disturbances from a restless partner. This hybrid spring mattress twin xl is ideal for couples or anyone sharing a bed. Medium Firm Feel -- The 12 inch hybrid mattress twin xl size is designed with a medium-firm feel, providing optimal support for back, side, and stomach sleepers. This level of firmness targets evenly distributing weight and aligns the spine, reducing the risk of back pain and promoting restful sleep. 100% Waterproof Mattress Protector Included -- Inofia twin xl mattress comes with a twin xl-size mattress protector to guard against spills, stains, and accidents. This fitted sheet features a premium TPU layer and fits all mattress types up to 18 inches. Surface: 70% cotton, 30% polyester; Skirt: dual-knitted fabric; Backing: TPU. This terry fabric mattress cover twin xl size with high-quality certified by OEKO-TEX Standard 100. 101-Nights Trial -- Each Inofia twin xl size mattress is shipped compressed in an easy-to-handle box, and includes a 101-night sleep trial and a 10-year limited warranty. Recommended to allow up to 72 hours for the mattress to regain its original shape.