The 8 mm. thick boot liner features three layers of space age technology.
RadianTex on the exterior to reflect the cold.
A middle layer of 18% wool felt for insulation and to lock in moisture, a 77% polypropylene inner lining to wick moisture away from the foot and 5% of miscellaneous fibers.
This boot liner is crafted in a "skidoo boot" style with heel reinforcements for extra support.