The Sheepskin Tendon Boots Elastic have a tough outer shell casing which is styled in an extremely light yet strong TPU to protect against impact, whilst the tendon and fetlock areas are both reinforced with D3O shock absorbing molecules for ultimate protection. Our artificial sheepskin is attached to a knitted base that is very air permeable and breathable and then laminated to a suede fabric that is also breathable and air permeable.