Brand New Purple Traditional Japanese Floor Futon Mattresses, Foldable Cushion Mats, Yoga, Meditaion. Cover Material: 100% Polyester Brand new, filled with white cotton, a layer of polyester fiber and a layer of foam. Mattress size: 3" thick x 30" wide x 80" long. Meets flame retardant requirements by laws. We ship the mattress in a smaller shipping box to lower the shipping rate. After opening the package, mattress is corrugated, the size is maybe slightly shorter in width and length. Original size will be regained after stretching and pulling out 2 ends longer. Caring instructions: the cover is used to hold the cotton battings together, it is fixed, not removable for washing. Spot clean only with a damp cloth. May use any larger cloth sheet to cover the top of mattress while using.