The Heavy-Duty Folding Rest Mat, model PM3, is a child's rest mat. This super-thick, foam-filled mat has a vinyl cover that is extra-tough, scuff-resistant, flame-retardant and waterproof. OPTIONS: Heavy-duty fitted sheet made of a polyester/cotton blend. DIMENSIONS (LxW): Opens to 48 x 24 inches; folds to 11 x 24 inches. Mat is 2 inches thick.