Pro Choice SMB-3 Sports Medicine Boot Value 4-Pack, The SMB 3 is a hybrid between the two best selling protective boots: the original SMB II and the VenTECH SMB Elite. The exterior is constructed with Professional's Choice signature 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 with each stride allowing full ankle movement, and helps 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. Lyrca binding stretches to create a more snug fit along the top and bottom of the boot, helping to keep dirt out. Booting all four legs allows the horse to comfortably maintain natural weight distribution. As an incentive to diligent horsemen, a Value Pack containing a full set of boots for both the front and rear legs is available at a substantial savings. SMB34S = Small Front/Medium Rear SMB34M = Medium Front/Medium Rear SMB34L = Large Front/Large Rear