The SMB-3™ is a hybrid between the two best selling protective boots, the original SMB II® and the new standard, the SMB Elite™. The exterior is constructed with Professional’s Choice signature limestone-based neoprene. Together with an UltraShock™ lining, the SMB-3™ 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, helping to eliminate 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 more snug fit, both along the top and bottom of the boot, helping to keep dirt out.