Four-Layer Structure for Superior Comfort – This rug features a four-layer design that provides ultimate water absorption and quick evaporation. Quick Water Absorption Layer: Instantly absorbs water and evaporates quickly, inhibiting bacteria and bidding farewell to bacterial growth. Diatom mud water absorbing layer: instant water absorption and rapid evaporation. Regenerated sponge: Soft and comfortable to enhance foot feel. Natural rubber layer: anti slip, durable, strong grip on bricks.