Constructed of polymer to ensure this rug pad will not break down in the heat or rain. Naturally anti-microbial. Mold and mildew resistant. An industry exclusive, this is the only rug pad that is specially engineered to be used outdoors. Other rug pads break up from UV rays, which damages both the rug and the floor/deck below. The only rug pad specially designed to be used outdoors, our Outdoor Rug Patio Pad slightly raises your outdoor rug, allowing it to dry quickly after a summer shower. Additionally, a barrier is established between the abrasive backing of the outdoor rugs and your patio or deck.. . . . . Made in the USA.