The SkyStep™ Nitrile Anti Fatigue Mat is a 13mm thick standalone rubber mat, giving you the best anti-fatigue relief for maximum comfort. Manufactured with 100% nitrile rubber to resist most industrail oils. Additional sure footing when standing on the mat. The mat makes full use of the air the passes through it, trapping it for a cushioning effect in chambers on the bottom of the mat. This gives you the best comfort on the market, allowing you to work on your feet all day to full effect. The anti fatigue mat is perfect to relief strain on feet, legs and the lower back.