M+A Matting 476 Happy Feet Nitrile Rubber Grip Surface Anti-Fatigue Interior Floor Mat with Striped Green Border, 5' Length x 3' Width, 1/2" Thick, Green Border Natural rubber foam offers outstanding anti-fatigue qualities Dense rubber cushion construction encapsulated with solid nitrile rubber resists damage from heels Grippers on the back minimize movement Low profile borders will not crack or curl Green 20 percent recycled nitrile rubber content