WaterHog Diamond-Pattern Commercial Grade Entrance Mat, Indoor/Outdoor Floor Mat 4' Length x 3' Width, Red/Black by M+A Matting Polypropylene fiber system dries quickly and won't fade or rot When wet, the rubber reinforce surface allows water to be wicked to the bottom of the mat away from foot traffic while providing a slip resistant surface Suitable for indoor or outdoor use Unique ridged construction effectively stores dirt and moisture beneath shoe level Exclusive "Water Dam" border keeps dirt and water in the amt and off the floor, minimizing slip hazards and floor damage