3/4" 100% wool felt top absorbs shock; 1/2" closed cell foam bottom is anti fungal and antibacterial, total thickness combined is a generous 1" 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 provides a closer fit for the saddle. Size: 31" X 32"