Block windchill without tallying up a bunch of extra ounces. Mountain Hard Wear's Windstopper Vest wraps your upper body in a lightweight and windproof layer of WindStopper Microfleece face fabric without trapping vapor close to your skin. The stretchy Lycra binding around the arm holes and waist hem accentuate your mobility without catching or chafing on inner layers. The Mountain Hard Wear Windstopper Vest is an excellent choice for climbing, hiking and trail running on blustery days.