Under Armour Run Windstopper Legging - AW15 UA Storm gear - Uses a DWR finish to repel water without sacrificing breathability. Lightweight WINDSTOPPER panels - Delivers total windproofing with maximum breathability. Dual-layer fabric - With an incredibly warm, brushed interior and a slick, fast-drying exterior. 4-way stretch fabrication - Allows greater mobility in any direction. Moisture Transport System - Wicks sweat away from the body.