This PROTECTION Pad is 32" long, 34" wide. Main pad is dense 1/2" Polyester Felt. The LINER PAD is 1/8" Poly Felt with a lower of 1.5" Polyester fleece glued and sewn & includes a vinyl reinforcing center strip. It has the same patented center cut of the Main pad it attaches to with 1" Elastic & Velcro at front and rear center. I use Polyester Fleece because it was PATENTED after clinical test showed the horse's back ran cooler because the fleece held MORE AIR & LESS SWEAT than WOOL. Extra Liner Pads will be available at a later date. FLEECE is the ONLY TRUE PADDING. Thick felt pads cause Pinching or Rolling.