Exclusive patent pending hybrid technology was designed to reduce the negative effects of sitting all day. Unique, dual sit to stand desk solution that promotes good health and increases productivity. 3/8" foam cushion with vinyl backing provides comfort and support to the body while standing. Innovative hinge folds for cushion, unfolds to full size chairmat. High quality vinyl chairmat provides a durable rolling surface and floor protection. Fluted underside grips low pile carpets up to 3/8" thick including padding and hard floors. Mat with Lip: 36" x 53" with 20" x 18" lip. 1-Year "No Crack Mat Warranty". Made in the U.S.A.