The latest in Futology. We've taken the typical cotton futon and revolutionized it by adding an inner spring coil unit. Great for all bi-folds, especially one being slept on daily. Made with our custom-designed flex spring to fold as a couch, and yet feel like a traditional mattress. This mattress also features four layers of high-quality super soft foam and 100% pure-blended cotton batting. Today's best inner spring.