Does working out in the garden leave you knees feeling flat-out tired? Well, this earth-friendly gardening mat will have you pumped up about getting your hands on those weeds again. Its rubber exterior is made from recycled industrial tires. Because this is the material from the inner tube, rather than the tough exterior, the surface is surprisingly smooth and flexible. Not only is the material extremely durable, but it"s also naturally slip resistant, water resistant, and abrasion resistant. The rubber conceals an inch-thick cushion of anti-fatigue foam, for an easier ride on your knees, and the rounded shape of the mat gives you the freedom to shift left and right without having to re-position it. Mat comes with a sturdy, attached nylon handle for carrying. Handmade in Milwaukee, WI.