*Insulated* Lace To Toe 10.5 EE - Ready To Ship!These Boots are fully insolated with Polarthin XP. Polarthin XP is a cutting edge aerogel fabric with up to 4 times the thermal insulation performance vs. traditional synthetic insulation materials. Polarthin has been specifically engineered for use in performance clothing and cryogenic applications. This feat of scientific innovation does not require loft to insulate & maintains thermal insulation.
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