Foamrush 2 X 24 X 24 Water-Resistant Dry Fast Outdoor Upholstery Foam Sheet For Outdoor Marine Furniture (Chair Cushion Foam For Patio Furniture, Boat Seat Cushion Replacement)Dry Fast foams are suited for outdoor use where moisture and precipitation like rain is prevalent, such as in patio furniture, or in marine cushioning on personal watercraft ..