The Mammut Trion Guide 45 pack is a robust mountaineering backpack offering versatile equipment packing options along with outstanding comfort. Pack can be stripped down to form an ultralight option for summit ascents or other light-and-fast adventures hipbelt can be swapped out with included lightweight webbing belt. Hipbelt, shoulder straps and back panel feature 2-layer, high-density EVA padding and laminated stretch fabric covers for breathable comfort. Shaped shoulder straps and hipbelt follow the contours of your body. Butterfly suspension allows full freedom of movement for your upper body with a torsionally flexible, anatomically-shaped frame that transfers the load to your hips. Minimal contact points enhance cooling ventilation. Top lid sports internal and external pockets for organizing small essentials. Front pocket has a reinforced, abrasion-resistant back for carrying crampons. Reinforced ski carrier, daisy chain gear carrier, detachable rope-fixing strap and 2 removable ice axe attachment points let you lash tools and gear to the outside of the pack. Compression straps can be conveniently tensioned at the sides or front. Hydration-compatible design features a reservoir sleeve and tube exit port for on-the-go hydration reservoir sold separately.