Imprint CumulusPro Professional Grade Anti-Fatigue Comfort Mat, 20 by 30 by 3/4-Inch, Vintage Toffee Cumuluspro mats are made with cushion-core technology to reduce fatigue and increase comfort and productivity - up to 97% thicker than other mats! Solid, one-piece polyurethane construction and a high-density core that's guaranteed not to lose support over time Beveled edge design and no-curl edges reduce trip hazard while the non-slip bottom keeps mat in place 10-Year warranty; 100% satisfaction guarantee! environmentally friendly and non-toxic Tested and certified by the national floor safety institute & endorsed by the American chiropractic association (ACA)