Deuter Aircontact Core – for all travelers who need a multifunctional and comfortable backpack for extensive trekking tours. The high carrying comfort is ensured by the Aircontact back system with Air Spacer Mesh and a large ventilation channel, ergonomic ActiveFit shoulder straps, and an adjustable chest strap. The Y-frame, movable hip fins, and ergonomic lumbar pad provide optimal load distribution. A large, J-shaped front opening allows for easy access to the contents of the backpack. Additionally, the spacious, removable 3L hip fin pockets offer extra volume for personal items. Water bottles up to 1.5 liters can also fit in a fold-out pocket. Since the carrying comfort of your backpack depends on back length, shoulder width, and body size, Deuter has developed specific SL models. These differ primarily in back length and the distance and shape of the shoulder straps from other models. Thus, SL backpacks are particularly well-suited for women and teenagers, as well as for slim and short men. Bluesign® (main material) This Deuter product is certified by Bluesign®. This means that production is monitored by a third party to eliminate all harmful chemicals or substances from the production process from start to finish. This benefits everyone: people, animals, and the entire planet.