The ventilated neoprene conforms to your horse, allows heat and moisture to escape, and keeps your horse cool, comfortable and performing at its best. The boot provides 360 degrees of impact protection, safeguarding the cannon bone, tendons and soft tissue, and is proven to absorb over 26% of energy from hoof concussion. The uniquely designed suspensory strap stretches with each stride, allowing full ankle movement and helping to eliminate hyperextension of the fetlock.SIZE Large