Back on Track Exercise Boots help keep your horse's muscles loose and supple, legs cool and tight. Back on Track products are made with Welltex, a state-of-the-art fabric that reflects your horse's natural body warmth and creates a soothing far infrared thermal warmth that may effectively stimulate blood circulation in the body. Keep your horse's lower leg muscles loose and supple and cool and tight. Olympic rider Michelle Gibson says these are "the best exercise boots ever." This product is also a bestseller in Germany where Olympic Gold Medalist Isabell Werth thinks this is the best product on the market today! The Exercise Boots are made of highly durable neoprene. They offer an excellent fit and superior protection as they easily form close contact with the tendons and bones in the lower leg. The neoprene hinders dirt and gravel from penetrating the boots. These are just some of the reasons our Exercise Boots are so popular. The Exercise Boots are an excellent choice for having the Back on Track effect during the entire workout, and to save time. The Exercise Boots are used for prevention by reducing the risk of ligament damage and attach with Velcro straps. The inside is lined with 50% cotton and 50% polyester fabric Sizes: Small (length of boot from bottom of fetlock is 10 1/2"), Medium (length of boot from bottom of fetlock is 12"), and Large(length of boot from bottom of fetlock is 13"). The exercise Boots and all Back on Track products can be machined washed at 30 degrees Celsius/86 degrees Fahrenheit with mild detergent. Note: DO NOT use fabric softener. DO NOT tumble dry because the product can be destroyed. Line Dry Only. DO NOT iron at a temperature higher than 50 degrees Celsius/122 degrees Fahrenheit