Large Floor Mat Castle Mats, Size 3x5 feet, Non-Slip, Durable, Nitrile Rubber GREAT FOR OUTDOOR USE: This 3x5 foot drainage floor mat, 3/8 inch thick, is made entirely of nitrile rubber, which is waterproof and skid-resistant. Nitrile rubber makes these floor mats oil, petroleum, and grease proof. WATERPROOF & GREASE-PROOF: Naturally waterproof, these drainage mats can be left outside. Additionally, oils and grease will not cause harm to the mats or reduce their anti-slip properties ANTI-BACTERIAL, EASY TO CLEAN: These nitrile rubber drainage mats quickly dry and resist buildup of mold and mildew. The mats are designed to guard against degradation from micro-organisms and minimizes the mats from being a source of odors. They can be easily washed with water. NON-SLIP SURFACE: The nonskid surface ensures this mat stays firmly in place on the floor. A grid of rubber allows water to drain through the mat as you walk effortlessly across without slipping or splashing water CUSTOMER SATISFACTION GUARANTEE: All Castle Mats products come with our customer satisfaction guarantee! No Questions asked.