Twin XL: 80"L x 38"W x 12"H Firmness: medium Memory foam Temperature regulating Removable cover Adjustable base compatible* Purchased about a year ago. Excellent condition. No stains, rips, sags or anything. Have been used with mattress protector. *Adjustable base available for $800. Head and foot adjustment, remote (wired), high enough for under bed storage. Purchase both mattress and adjustable base for $2500