Professional's Choice SMB 3 Sports Medicine Boots-2 PackHybrid between 2 best selling protective boots: the original SMB 2 and the VenTECH SMB Elite Exterior is constructed with PC's 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 Helps to eliminate hyperextension of the fetlock Cut back at the lower front