PROTECTOR pads run COOLER than other pads with the ELLIPTICAL center cut! Shields of the patented Corrector system are shown below. The 112" of Slots allow for ventilation and are the secret to passive control of saddle pressures. The 4 IMPACT-RESISTANT Polymer Shields are molded to ride over the horse's shoulders while protecting them. The Saddlepad moves FREELY throughout as the back changes shape. Works great on any Horse or Mule. The Contoured PROTECTOR has a 5.5" Cutback in front & has a Center leather re-enforcement. The Liner, shaped like the Protector, is attached with 1" Elastic & Velcro front & Rear. It is easy to remove & wash. NEVER WASH YOUR PROTECTOR SADDLE PAD again when the 3mm FELT or 1" FLEECE LINER-PAD is used. The fleece version is $30.00 extra & takes serious break-in Riding. The FELT Liner lets the saddle get down around your horse much quicker. Note: 6 front and 4 rear, 1/4" balance shims come with all western PROTECTOR Pads.