The Patagonia 28L Terravia Pack features breathable, lightweight airmesh on the raised back panel and the underside of the shoulder straps to keep you cool and comfortable throughout the day. A hip belt helps distribute pack weight and includes side pockets for small items. The interior offers a lid pocket and a key clip, while the pack face includes a drop-in pocket; exterior trekking-pole loops provide easy access to poles during tricky terrain and out-of-the-way storage when not in use. An internal hydration reservoir sleeve and pass-through sit between the shoulder straps, allowing the tube to be routed over either shoulder, and dual side pockets fit full-sized water bottles. The front drop-in pocket holds an extra layer or gear, with drain holes to keep wet items separate from the rest of the pack.