FTMT-VISCO38 Size: Twin Extra Long Features: -Gel Infused Memory Foam Mattress Topper.-Antibacterial silver treated cover.-Bacteria free.-Bedbug proof.-Dust mite proof.-Allergen proof. Dimensions: -Twin XL: 11" H x 11" W x 28" D; 14.5 lbs.-Queen: 11" H x 11" W x 28" D; 16.5 lbs.-King: 11" H x 11" W x 28" D; 26 lbs.-California King: 11" H x 28" W x 11" D; 26 lbs.