Our Derby Originals Polar Fleece Exercise Horse Sheet was designed to provide a comfortable, lightweight winter riding option for riders who wish to keep their horses comfortable under the saddle and help warm up and loosen up the muscles and prevent stiffness. These rugs can be worn around the saddle skirt or over the rider's legs to help prevent chills and keep both you and your horse comfortable at the same time. The horse sheet is available in sizes for Average and Large horses and comes in colors Hunter Green and Navy Blue.