NoTrax Rubber 474 Ergo Anti-Fatigue Mat, for Dry Areas, 2' Width x 3' Length x 1/2" Thickness, Black Corrugated rubber top surface is resilient and adds traction Dense closed cell sponge base provides cushioned comfort Exclusive Red Stop technology creates non-skid bottom, reducing mat movement Unifusion bond eliminates mat de-lamination; bond is guaranteed for life of the mat 1/2" thick, beveled edges on all 4 sides for safety