Sherpa Adventure Gear Namche Microfleece 1/2 Zip Hoodie - Women39;s 100% polyester Constructed of 100% polyester Polartec 100 Classic Micro. Polartec Classic Microfleece has a great warmth-to-weight ratio, with a soft hand. Half zip for maximum ventilation and greater on/off ease. Hood fits snugly around head and face to keep in warmth. Flat seams are set to minimize chafing from pack straps and harness.