An additional base layer of GORE WINDSTOPPER to your regular outfit will keep it warmer on cool and cold days without being too bulky. By wicking sweat away from the skin, you won't sweat on the ascent or shiver on the descent. - Details: - Front, over the shoulders and in the kidney area with GORE WINDSTOPPER membrane: windproof, water-repellent and highly breathable - Extended back - Thin and soft material - Next-To-Skin comfort - Type: short sleeve - Material specifications: Main fabric: 100 % polyester | Stretch: 88 % polypropylene, 8 % elastane, 4 % polyamide - Size information: size runs true to size - Fit: regular fit Material - Type of material: synthetic fiber - Seams: flatlock/flatlock seams Features - Compression: no - Thermal function: no - Special features: breathable - Collar shape: round neck - Zip: without