This Sealy Dreamlife 3” Foam Twin XL Size Mattress Topper is designed to help you stay cozy all night (or all day) and wake up feeling refreshed. And it’s made by Sealy, a leader in quality sleep products for over 140 years. Advanced SealyComfort gel memory foam adapts and responds to every part of your body to provide pressure relief and a personalized sleep experience. A soft, stretchable SealyCool Stretch Knit Cover helps keep you cool and comfortable through the night and includes corner straps to ensure that it stays in place. The cover is also removeable and machine washable for easy care. Sealy Dreamlife is dedicated to promoting a healthier sleep environment. CertiPUR-US ensures the mattress foam meets strict standards for content, emissions and durability, and Surface-Guard Technology kills bacteria on the surface of the mattress, protecting it from common allergens. This mattress topper was designed and built in the USA and includes a 1-year limited warranty, so you can rest easy with comfort you can count on.