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Keen Footwear

ThermoBall Insulation

Acts Like Down, Warms Like Nothing Else

ThermoBall™ insulation was created in partnership with Primaloft and designed to mimic all the benefits of down feathers with none of the downsides. Outerwear insulated with ThermoBall™ feels lightweight, packs down small, and offers massive warmth—even when wet. This is insulation innovation.

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