All shimmable pads begin with a ThinLine 3/16” panel over top of the base pad. Each saddle pad has a pocket beneath the ThinLine panel to place optional shims for fine tuning saddle fit. With this new style of shim for the Cotton Trifecta Half Pad the same shim will work in all sizes of pad.
You got it, you can use a front or bridging shim in a small, medium or large Trifecta Cotton Half Pad. The rear shim does have two different options, one for a small and the other for the medium/larges.
Sold as a pair, with your option of 1/4"(thicker) or 3/6"(thinner) in thickness.