This pad is designed to assist in fitting a saddle to a horse who experiences bridging across their back because of a lower than typical curve. When a horse has a dropped back, he needs pad support to fill in the gaps between his back and the saddle tree to help distribute the rider’s weight to eliminate pressure points. 1 1/2" thick foam core in the center that tapers to each end to level the saddle from front to rear and fill in any voids. USA Hi-Tech Fibers Spine Relief Channel Shock Absorbing Stain and UV Resistant Contoured Spine Fleece bottom provides a plush comfort against your horse. 30″ x 30″ x 3/4″