It’s never been easier to provide instant comfort for your guests with the Rollaway Guest Bed. The 4” mattress provides generous loft for great comfort with no “center bar” that typical rollaway or sofa beds use for support. Instead, we use spring-mounted netting that supports the entire mattress. The mattress has two different layers of premium foam with the top layer being 1” thick fiber padding on top of 3” of super soft foam. The cover is a silky soft fabric made with a blend of bamboo rayon fiber. The mattress dimension (31” x 75”) is as long as a twin bed, but slightly narrower (Twin width is typically 39”). The frame folds up compactly to save space and has four rolling swivel wheels that makes it easy to transport when folded (the wheels are raised and don’t touch the floor when the bed is being used). A cover completes the storage design to keep your guest bed clean and dust free between uses. Available in one size. Fully opened the 4” mattress dimensions are: 31” wide x 75” long x 14” above the floor. Closed with cover: 32” wide x 38” tall x 10” thick. Maximum weight allowance: 250 pounds.