Anyone who has stood on a hard concrete floor for longer than a few minutes will tell you how hard the surface can be on your feet, knees and back. Reduce the fatigue and soreness with the AmeriHome 3 ft. x 3 ft. Interlocking Rubber Mat Set. Four 3 ft. x 3 ft. flexible rubber anti fatigue mats interlock on 2 sides to create a custom shape for your space that covers up to 36 square feet of space. Perforated rubber 1/2 inch (14mm) thick provides cushion, and the non-slip fatigue mats give you more traction when grease and other liquids get spilled. Just spray it clean with a hose or power washer when it gets dirty. Get the best anti fatigue mats for your home today.