Gore Running Wear Women's Essential Windstopper  Base Layer Long Sleeve Shirt 100% POLYESTER, WINDSTOPPERMEMBRANE, INSERT: 88% POLYPROPYLENE, 8% ELASTANE, 4% NYLON Imported Windproof long-sleeve shirt is ideal for windy and cold days. Provides warmth and quick moisture management. Protects from cooling in front, shoulder and kidney area. Tight fit Elastic WINDSTOPPER insert on front, over shoulders and on kidney area Thermo-stretch functional fabric Minimized seams for less chafing Flat-lock seams Extra-long back