3/4" (1.9 cm) 100% wool felt top absorbs shock. 1/2" closed cell foam bottom is antifungal and antibacterial, and allows the horse's back to cool itself. 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. Cut out in cinch area for a closer fit for the saddle.