Endurance Contoured Sierra Gold Pads are high-density Virgin Brown Wool which has a soft hand. Virgin wool offers the purest unprocessed wool fibers. Endurance Performance Pads are cut to fit endurance and western round skirt saddles. The contoured spine has a wither relief notch and is reinforced with distressed leather. 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.