he 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.