Craft's Windstopper Long Sleeve Crew features Gore Windstopper Piuma 4-way-stretch fabric in the chest and keeps the core warm by blocking wind. • Gore Windstopper Piuma four-way-stretch fabric • Windstopper windblock front • Pro Zero Fabric • Flat Lock Stitching • Drop Tail • Unisex (sizing based on Men's) • Machine washable and dryable