"Rhyolite" Insulated LinerBy using a separate inner lining, you can easily adapt your horse's normal outdoor rugs for colder temperatures. "Rhyolite" has a lightweight filling to provide additional warmth without putting extra pressure on the muscles. The liner has a comfortable insulating effect without getting too hot or sweaty, as the material is breathable. The entire liner has a smooth surface to be gentle against the fur. The Welltex infused lining can increase blood