The perfect addition to our WB0109 Nature Reading Haven or CH0281 Whitney Plus Porthole Play House Cube! This high density 1-1/2" thick foam mat provides optimum comfort in jersey-lined vinyl cover that cleans up easily with a damp cloth and mild soap. The cushion is phthalate-free and meets ASTM F963 and CAL TB 117 fire retardancy standards. One year warranty.