The North Face Men's FuseForm Originator Jacket is a waterproof shell jacket for alpine climbing and mountaineering. The North Face has used new construction they like to call FuseForm to create a seamless blend of two types of fabric, creating a stronger, lighter jacket. The HyVent®, 2.5L, 100% engineered nylon ripstop is 100% waterproof/breathable and adds in Cordura® yarn for strength. The upper chest and arms are more durable to provide extra protection while the lower torso is lighter weight. Paired with the features you've come to know and love, such as the helmet-compatible hood with brim, internal chest pocket, and handwarmer pockets that won't get in the way of your harness, you'll be moving up the mountain with less weight and yet a stronger element deterrent.