WINDSTOPPER® Fabric provides total windproofness and maximum breathability, keeping you comfortable longer across a wide range of weather conditions and activities. The windproof membrane inside slams the door on windchill and protects the warm yet highly sensitive microclimate that surrounds your skin. And the 1.4 billion micropores in every square inch of the WINDSTOPPER membrane let water vapor from perspiration escape virtually unhindered, even when you’re working at maximum intensity.
How does it work? The WINDSTOPPER membrane is an ultrathin protective layer, that is laminated to a lightweight textile layer, making it totally windproof. It is made from the versatile polymer PTFE (polytetrafluorethylene) which is expanded to create a microporous structure. These micropores are 900 times larger than water vapor molecules, allowing perspiration to pass through unhindered. This means that the WINDSTOPPER membrane adds total windproofness to any textile without perceivably restricting its initial breathability or weight.
Soft, lightweight: Provides insulating warmth without added weight
Warm, dry insulation: Allows perspiration to easily escape keeping you warm and dry from the inside
Water resistant: Sheds snow and water to protect the insulation. Dries quickly