Thinline+ Saddle Fitting Shim – 1/4″ thickness
New in bag Thinline cut-to-fit shims. Compatible with Thinline shimmable half pads and saddle pads.
From the Thinline website: “Made of the same shock absorbing, comfort foam found on our saddle pads. In addition to creating perfect saddle fit it also protects your horses back and improves comfort for horses and riders. ThinLine Plus+ is 1/4″ (6.4mm) thick”