Gray Anti Fatigue Mats with Ribbed Pattern are 5/8" thick. They are designed to reduce the fatigue and lower the risk of injury to feet, knees, and lower back. Research shows the negative impact of standing on hard surfaces for a long time on a worker's health and productivity. The products pay for themselves through improved productivity and tardiness. It combines the durability of vinyl foam cushion technology with a slip resistant top for safety in the workplace. This anti fatigue mat has moisture and stain resistant properties that cuts the cleaning and maintenance time.