SMB IIs are the best selling equine leg care products in the world. They have protected countless performance horses over the years in every imaginable event, including polo, jumping, reining, barrel racing, endurance, working cow horse and many others. For many horses, these boots have meant the difference between an extended career and periodic or permanent injuries. So, its no wonder there have been numerous attempts to copy them. 30-Day money-back guarantee/six-month warranty or as required by law. Sold in pairs.