Anti-Fatigue floor mat is ergonomically engineered to stimulate blood circulation and reduce fatigue on legs, back and feet by providing better pressure distribution and significantly reducing contact stress Patented rubberized-gel foam is 17mm thick and provides Superior performance over thicker polyurethane foam competitors Nfsi certified anti-slip surface reduces slipping concerns and ensures mat stays in place. Ada-compliant beveled edge ensures mat will not roll-up, is trip-resistant, and provides 18 Degree angle for Office chair to roll up on with ease. International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions.