Sleek, lightweight, stylish with all the performance you would expect from Cavallo. Sport boots are a narrower boot than the Simple boot. Sport boots have a simple front fastening with industrial grade Velcro closures. Simple to put on and remove; stays securely on hoof. Sport boots are shaped for the natural hoof (needs no inserts or shims).  Molded-in back flap for bulb protection and abrasion resistance. Durable construction: Waterproof thread, rustproof metal and high performance TPU outsole. The only hoof boots with built-in drainage. Absorbs shock - so your horse's legs don't need to. They promote healthy hooves: allows expansion and contraction and increased blood circulation. These boots have built-in break over and a surefooted low-profile sole. Sport boots have a unique tread pattern that supports the frog and an innovative sole design provides natural heel (skid) brake. Sport boots have reflective piping for safer riding and are narrower - 1/4" (5mm) than the Cavallo Simple Boots. Size 3 fits a hoof 4 15/16" - 5 3/16" in length. Sold in pairs.