Check the listing for details. ThinLine Full Sheepskin Trifecta Half Pad. Condition: New. Listed at 270.00 USD. ThinLine Full Sheepskin Trifecta Half Pad - formerly Ultra ThinLine The ThinLine Full Sheepskin Trifecta Half Pad is a performance enhancing product for the rider and the horse. Not only does it offer shock absorption and comfort for the horse, it also reduces rider movement, improving equitation and harmony between horse and rider. ThinLine saddle pads noticeably reduce lower back and thigh movement, allowing the rider to sit gaits with less effort and achieve a more stable position in the saddle. The result is a quieter ride with increased effectiveness of the seat and increased communication with the horse through a closer contact feel. Medium = 23″ total spine length | 18.25″ spine between the rolls | 18″ across seatLarge = 25″ total spine length | 19.5″ between the rolls | 18.5″ across seatIf your saddle has large or wide panels, Large is probably bestThinLine is endorsed by spinal surgeons for riders with sore backs and endorsed by top professionals and competitors for better performance both for the horse and the rider. It is sold by over 95% of Master Saddlers in the USA. ThinLine is the only product demonstrated by independent testing agencies to reduce rider movement and thereby improve rider equitation. Results are similar for all levels of riding. Many Grand Prix and Olympic riders are using this pad because their horses round up quicker, stay softer and more supple, and the riders sit more quietly. As an added benefit, this pad is also "shimmable" for riding multiple horses in the same saddle, horses changing shape as training progresses, and to customize saddle fit.