The Aircontact 45+10 is a very popular backpack for Mountain Climbing, Ski Touring and Trekking because of its great handling, carrying comfort and its exceptional back ventilation. It is also an excellent pack for short backpacking trips. Those of the "light and fast" mentality will love it for much longer ventures. The Aircontact 45+10 has a comfortable ergonomic suspension that keeps you cool and keeps the load ridding just right.It is also and excellent choice for rock climbing. The double layered bottom means your climbing gear wont be poking holes in your backpack; its plenty durable to handle endless climbing trips to the local crag.