The TRILOGY V ICON INFIN mountaineering jacket is 100% windproof and waterproof, making it suitable for most high-altitude conditions. This highly versatile technical mountaineering garment is comfortable and lightweight without sacrificing any protection. Its hybrid construction combines the reliability of a GORE-TEX WINDSTOPPER™ LIGHT ACTIVE 3L membrane with the freedom of movement of exceptionally stretchy PERTEX® EQUILIBRIUM fabric under the arms and at the back. You won't have to worry about chafing on rocks during intense vertical climbs. This mountaineering jacket is highly durable and perfectly suited to climbing and approaching.