Fully Reversible (Double Life)-1" Down Alternative Mattress Topper / Pad- w/ Stay Tight Anchor Straps (Twin XL) Fully Reversible-Rotate your topper when you rotate mattress to ensure even wear and extended life. 95gsm Super Soft -Durable-Microfiber Cover Material. Size: Twin XL. Dimensions: 39" x 80". Machine Washable.