What Our Gearhead(R) Experts Are Saying:"I've used the Aircontact Core 55+10 SL on multi-day backpacking trips where I need comfort, capacity, and a dialed fit. The SL shape really works for my frame, and the ventilation helps when I'm grinding out big climbs. It's easy to access gear without dumping the whole pack, which is a game-changer on the trail."For extended adventures where we carry everything we need on our backs, comfort is key-and the Deuter Aircontact Core SL 55+10L Backpack delivers. With its SL-specific fit and adaptable design, this pack is made for long-distance treks that demand smart load management and breathable support. Whether we're moving hut-to-hut through the Alps or chasing high alpine passes closer to home, this pack keeps us focused on the trail, not the weight. The Aircontact back system uses breathable mesh and a stabilizing aluminum Y-frame to keep airflow high and the pack stable under load. A torso-length adjustment system and pivoting ECL hip fins ensure a close, comfortable fit for smaller frames. Storage is intuitive with front, top, and bottom access points, a detachable lid, and an internal divider to separate gear. With a 10-liter expandable collar, hydration compatibility, and eco-certified recycled materials, the Aircontact Core 55+10 SL is built for serious mileage and real-world functionality.