3/8" wool blend top offers superior shock absorption and protection, and resists compression and matting for a longer life. Advanced polymer insert evens pressure like memory foam, cushions like a gel, and dissipates pressure by reacting to impact on a molecular level. 5/8" orthopedic grade felt bottom soaks up moisture, allowing heat to dissipate away from your horse's back. It conforms to the horse's back while maintaining density, and provides excellent shock absorption. This felt is washable so sweat and grime can be washed away as needed. Cut out over withers and contoured to fit your horse's back with a split design that allows the pad to move with the horse. Designed to be used alone or with a blanket.