What Our Gearhead® Experts Are Saying:"When I'm heading into the alpine for multi-day climbs, I need a pack that carries heavy loads without weighing me down. The Ascensionist 55L delivers with its lightweight aluminum stays and modular design, letting me strip it down when I need to move fast. The spindrift collar expands for extra storage, and the rope-carrying system and ice tool attachments keep my gear secure. Whether I’m hauling gear on long approaches or making a final summit push, this pack is built for the job."For full-value alpine missions, we need a pack that can handle everything from heavy hauls to fast-and-light pushes. The Patagonia Ascensionist 55L Backpack answers the call with a streamlined design that balances weight, capacity, and versatility. Built for long approaches and high-altitude climbs, this pack features lightweight aluminum stays for support and a customizable fit with a removable lid, frame, and hip belt pads. Storage is dialed for efficiency, with an expandable spindrift collar, a secure rope-carrying system, and modular compression straps that let us adjust our load for any objective. Ice tool attachments handle a variety of axe shapes, while the internal hanging pocket keeps smaller essentials within reach. Made with durable, weather-resistant recycled nylon ripstop, the Ascensionist 55L is built to withstand alpine environments while keeping us moving fast and light.