Imprint CumulusPRO Couture Anti-Fatigue Comfort Mat, Black Jasper, 24" x 36" Top Rated Standing Desk Anti-Fatigue Comfort Mat - Up to 97% thicker than other mats! Environmentally friendly, non-toxic & phthalate free, Safe for children and pets CumulusPRO Mats are made with Cushion-Core Technology to reduce fatigue and increase comfort and productivity Contoured beveled edge design and no-curl edges reduce trip hazard while the non-slip bottom keeps mat in place. Solid, one-piece polyurethane construction and a high-density core thats guaranteed not to lose support over time Lifetime 100% satisfaction guarantee! If you dont love your new Imprint Comfort Mat exchange or return it without question. Whenever. Tested and certified by the National Floor Safety Institute & an American Chiropractic Association (ACA) Partner