The best sleep of your life starts with a firm foundation. The Tempur-Pedic Flat Black Low Profile Flat Foundation, Twin XL will keep your mattress (and you) fully supported. With end-to-end support, the flat surface is free of bumps and lumps. This stable and supportive foundation is the perfect place to build your own oasis of cozy comfort. It is sized to fully support a twin XL mattress. Sleeping in late never felt so good! Product Details: • Suitable for foam, hybrid, or innerspring mattresses • Made to fit Twin XL bed frames • Using a firm mattress foundation can prolong the life of your mattress Dimensions: • 38”W x 80”D x 5”H