? SLEEP SYSTEM ALSO INCLUDES | One Twin XL 12” Luxury Cool Gel Bionic Infused Memory Foam Mattresses: Medium Soft Feel. | Bionic Cool Gel Infused Memory Foam Supports your Full body eliminating pressure points on your Shoulders & Hips and whisks away unwanted heat while you sleep in Gah Gah Land- (Dimensions | Twin XL = 38 x 80”)