ThermoBall™ is a revolution in synthetic insulation technology. Unlike traditional, continuous-filament synthetic insulations, the small, round synthetic fiber clusters closely to mimic down clusters; trapping heat within small air pockets to retain warmth.

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WindWall® fabric is a wind-resistant fleece. WindWall® utilizes a unique fabric-bonding process that allows a limited degree of external air permeability (approximately 20 CFM), which drastically reduces the effects of windchill and enhances your warmth and comfort.  WindWall® 1 fabric has a mesh liner, while WindWall® 2 fabric has a grid fleece liner for even greater insulation.

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