TR Industrial TR88250 Anti-Fatigue Mat For Home, Office, and Kitchen Standing Relief, 23.25" x 34" x 3/4", Black, 24" x 36" Keep employees and yourself comfortable using a 23.25 x 34 x 3/4" anti fatigue mat to cushion feet and reduce pressure on body Made of NBR (Nitrile-Butadiene Rubber) + nontoxic PVC, which is lighter and more durable than other mats containing polyurethane (PU) NBR is water-resistant due to its closed pores and does not absorb any water, oil or other liquids Complies with UL94HBF fire safety standards Backed by a 10 year warranty