100% Cotton Filled Mattress Pad - Twin XL Cotton 100% Cotton Top and Cotton Filled Twin XL Mattress Pad! Provides an extra layer between you and the mattress and is specifically sized to fit Twin XL beds Basic bedding supplies item with a luxury twist (cotton fill!) High Quality 100% Cotton exterior and interior provides you all the natural and positive properties of cotton. Dimensions: 39" x 80" x 12"