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 this Anti-Fatigue Interlocking Rubber Utility Mat. 4 Flexible rubber mats interlock on 2 sides, to create a custom shape for your space that covers. Perforated rubber provides a cushion, and the non-slip surface gives you more traction when the grease and other liquids get spilled. Just spray it clean with a hose or power washer when it gets dirty.