These anti-fatigue mats are commercial grade with a 3/4" thickness and air domes that provide comfort for your legs, feet and back. Beveled edges increase safety by helping prevent trips and falls. They are made with recycled rubber for maximum durability and are fully recyclable. The Flex Step Series of mats received the APMA (American Podiatric Medical Association) Seal of Acceptance for promoting foot health. They are also Certified 'High Traction' by the National Floor Safety Institute (NFSI).