Rhino Mats UD2436S Ultra-Dome Workstation Anti-Fatigue Welding Mat, 2' Width x 3' Length x 3/4" Thickness, Black Design encourages frequent yet subtle changes in posture, inducing natural flexing of muscles, thus reducing the build-up of lactic acid that causes fatigue Perfect as a single work-area mat, check stands, assembly stations, convenience stores Single piece molded beveled borders on all 4 sides allow easy employee access Solid and drain-thru mats available Black color with black bevels