Engineered with 3-layer Gore® Windstopper technology. Garments made with Gore® Windstopper® are totally windproof and deliver maximum breathability to keep you comfortable in cool and windy conditions. The Windstopper membrane blocks the wind and allows moisture vapor from perspiration to escape. This combination of protection and breathability minimizes the wind’s chilling effect while reducing the risk of overheating when you are active. A durable outer fabric treatment (DWR) provides you with the additional protection of water repellency.