Description of The North Face Impulse 1/4 Zip Shirt Stay comfortable on and off the trail. Features: Shell a and c: 240 g/m² 90% polyester, 10% elastane - wicking Shell b: 150 g/m² 76% micropolyester, 23% biconstituent fiber (98% polyester, 2% carbon from bamboo), novelyt circular knit piquè - wicking, UPF Carbon from bamboo technology Body-mapped for increased comfort and temperature regulation Flat-locked seams Quarter zip Left Napoleon patch-on pocket Reflective graphics on upper biceps Stash pocket on lower back right hem Monkey thumb cuffs Drop tail hem Wicking Ultraviolet Protection Factor (UPF) 30