Endurance Contoured Relief Pads have a durable cotton duck top with a 1"  or 1/2" Wool felt bottom. Contoured along the spine for an instant fit and cut to fit endurance and western round skirt saddles. The pockets contain 1/2" Wool felt shims, which can be removed to better fit your saddle. The Endurance Square shape has a 16 ½ inch drop making the overall width 33 inches, the seat drops 13 inches, and the spine of the pad from front to back is 30 inches long.