5 Piece Waterproof Liner set includes polyurethane liners for 2 base pieces (33"x33"x5"), 1 trapezoid wedge (13"Wx13"Hx26.5"L), 1 half circle (31.5”Lx15.75”Wx10”H), and 1 armrest pillow (5”x5”x31.5”). This liner will protect your high-quality, high-density polyurethane foam that has been certified through the CertiPUR-US program which prohibits the use of any CFCs, or other ozone depleters, in the foam manufacturing process. Mod Blox waterproof liner is kid-friendly, easily removable and machine-washable for quick and convenient cleaning – protect your foam from unexpected spills or any other mess thrown at them! We use high-quality YKK zippers on every liner. Each piece is tightly sewn with the finest workmanship and will last for years of creative fun. The 5 Piece Waterproof Liner Set includes waterproof liners for 2 base pieces, 1 trapezoid wedge, 1 half circle and 1 armrest. Mod Blox 5 Piece Waterproof Liner is made with polyester fabric and polyurethane backing that is kid-friendly, easily removable and machine-washable for quick and convenient cleaning. The liner is made to cover your foam pieces completely and worn underneath the microsuede covers. This liner will protect your foam against unexpected spills or any other mess thrown at them.