Hog Heaven Premium 7/8" Thickness Black & Black Border 4' x 10' Nitrile Backed Anti-Fatigue Comfort Mat The nitrile rubber / PVC cushion backing provides long-lasting comfort and will not degrade even with extended use. These anti-fatigue mats have nitrile rubber border that remain flexible for the life of the product and will not crack or curl even in extreme temperatures. Available in 5/8" and 7/8" thicknesses (this is the premium 7/8" model) Available in black and OSHA-approved striped border colors including red, orange, yellow and green. Environmental Green Rating: 20% Recycled Content