Comfort Zone Innerspring uses high quality components that give the best balance of motion separation, comfort and durability. Features 400 ct. - 14 gauge springs with 1.75" of high density foam and one layer on "coconut" fiber on both sides. This unit folds easily, yet provide firm, healthful support. Best suited for Bi-Fold frames. 15 year warranty. The best selling 9” futon. To learn more about Futon Sizes click here. Note: Split Full includes set of: 54x54 and 54x21 Split Twin includes set of: 39x54 and 39x21