The Patagonia Nine Trails 28L Pack is designed to lock-to-your back during technical all-day hikes and fast-paced ridge scrambles. It’s made of bomber 210-denier CORDURA® ripstop, which is lightweight, treated with a polyurethane coating, and a has DWR finish.U-zip access to the main compartment offers room for essentials, layers, and your hydration reservoir. A separate front stash pocket holds smaller, easily misplaced items. The pack’s exterior has a large stretch pocket in front and quick-stash pockets on the sides for securing extra gear. The 3-layer mono-mesh backpanel is the most breathable in Patagonia's lineup and is supported with a thermoplastic framesheet. The padded perforated foam shoulder straps and waistbelt, which has dual zip stash pockets, helps keep this 28-litre pack comfortably centered on even the most difficult ascents.