Top layer: Moisture absorbent polyurethane, anti-slip when both wet and dry Mid layer: Waterproof mid layer will prevent any moisture absorbed into top layer from seeping into bottom rubber layer. Anti-bacterial Bottom layer: Eco friendly natural tree rubber, high density, goo cushion, textured surface grips well to the ground Care Instructions: Wipe with soft, wet towel with mild detergent. Air dry, do not machine wash. Storing - Wrap the mat, polyurethane side out, in a cool and dry place when not in use. Sizing: 1830mm x 680mm x 4mm