E.A. Mattes POLY-FLEX Shims for use with any Mattes Correctional Pad. Adjust the padding to your individual needs for a custom fit. Each set has 6 front and 6 rear (3 per side)

POLY-FLEX® Shims are resilient, do not compact like foam or other materials, and allow incremental adjustments to be made easily.

The shims are 5mm thick, designed to be layered, and are easily trimmed with scissors to taper the ends and create a pressure free fit if multiple shims are necessary.