Designed specifically for unrestricted climbing on multi-pitch routes. Body expands for the approach, yet zips down to carry just shoes, windproof, energy bars and water. It has a wrap-around back system, expanding body that allows volume increase from 14 liters to 22 liters. It also has Ventilated back panel with Air Zone® back ventilation, die-cut breathable padded that harness the designed for unrestricted arm movement. This backpack is hydration compatible. Plus it  has a removable 20 mm web waistbelt, hydration system, chest strap, slim profile, padded lifting handle, internal zippered mesh pocket, and key attachment point. It has a removable twin ice axe attachment system, gear loops on harness, and rope compressor on top of the pack.