Check the listing for details. Toklat T3 Matrix Performance Black Shim Pad with WoolBack Lining and Impact Prot. Condition: New. Listed at 372.95 USD. He may not be a linebacker, but he deserves to be protected like one.The technology used to protect NFL players is now available to protect your horse. Introducing Toklat's T3 Performance Pads with Superior Impact Protection.Size 32x32To watch a video on the Matrix Shim Pad Click Here.Features include:An all-in-one pad with Impact Protection inserts AND shimsFull length Impact Protection inserts that cushion, protect, and absorb up to 90% of the energy transferred between horse and riderShims that allow rider to adjust an imperfect saddle fit, or compensate for asymmetrical muscle development. Build up side to side or front to back, as neededThis pad is not intended to be used with all of the shims at one time. If you find that you need all of the shims, you don't need a shim pad. Refer to the regular Matrix Round Skirt PadDetailed shimming instructions can be found here.Shim pad comes with three internal full-length pockets on either side of the spine, each pre-filled with two 1/4" customizable felt shims for a total of 12 shimsShims and Impact Protection inserts accessed through Velcro closure on the spineA rugged non-slip military-grade topperFeaturing WoolBack®, a 100% virgin wool liningExtremely lightweight and breathableCorrectly placed cut-out for close-contact leg positionHigh profile for maximum wither clearanceErgonomic design for maximum freedom of movementHardy genuine black wear leathersWhat this means for your horse:A noticeably more comfortable back and rounded top lineAids in maintaining a healthy backWhat this means for you:A more secure seat and less bouncing in the saddleLess stress on back, knees, and anklesWARNING Cancer and Reproductive Harm -- www.P65Warnings.ca.gov