SMx H.D. (Heavy-Duty) Air Ride Saddle Pads have a ¾" breathable core and hand woven 100% wool Navajo blanket top. Heavy-Duty SMx Air Ride core protects the horse's back from pressure. The Air Ride core is made of a unique material found in the protective gear of professional human athletes for absorbing shock while allowing air flow to the skin, creating a natural cooling system that lowers the horse's body temperature and slows the rate of fatigue. The soft merino wool lining wicks away moisture. These pads are appropriate for any western discipline.