Constructed of 100% Nitrile Rubber and can be used in environments that are exposed to animal fats and petroleum products. Green friendly containing 20% recycled rubber content. The molded grip-surface face cleats effectively scrape tough dirt and grime off shoes and provide an excellent anti-slip surface. They are certified slip-resistant by the National Floor Safety Institute. Available Colors: Black, Safety Green, Caution Yellow, Warning Orange, Danger Red. 1/8' Thickness. Anti-skid gripper backing.