The SMB-3 is a hybrid between Professional's Choice's two best selling protective boots, the original SMB II and the new SMB Elite. Constructed with Professional's Choice signature limestone-based neoprene and lined with UltraShock lining, the SMB-3 boot safeguards the cannon bone, tendons and soft tissue, while absorbing energy from hoof impact. The slightly longer suspensory strap stretches upon each impact of the hoof, allowing full ankle movement, while helping to prevent hyperextension of the fetlock. The SMB-3 is cut back at the lower front to allow for proper fit when used with any Professional's Choice bell boot. It also has lycra binding with a slight stretch that creates a snugger fit along the top and bottom of the boot, keeping dirt out. Can be used on front or hind legs, and for any discipline. "The more comfortable the horse, the better the performance." 30-Day money-back guarantee/one-year warranty. Set of 2 boots.