Deflecto DEFCM24142BLKSS 48 x 36 in. Ergonomic Sit Stand Mat Black Features Combines the cushion of an anti-fatigue mat with the smooth rolling surface Support foam provides cushion and resilience to reduce stress and strain on the users back, legs and feet Easily transition from sitting to standing Non-slip bottom surface grips hard floor surfaces and reduces the need to reposition the mat Use with wheeled office chairs or stools Use to cover worn, damaged or stained flooring Specifications Color: Black Size: 48 x 36