The Osprey Rook 50 hiking backpack has an innovative design for maximum performance and comfort. It has a capacity of 50 liters, enough for 2 or 3 day mountain expeditions. The back of the bag is very well ventilated with the AirSpeed mesh that ensures good air circulation. In addition, the waistbelt fits perfectly around your waist and part of your lumbar region for a very good load distribution to make the bag very comfortable to wear on long trips. Moreover, the belt is padded to support heavy loads. The 50-liter volume allows for a sleeping bag, while the bag's many compartments ensure that you can bring along the necessary equipment for several days of autonomy. The numerous compression straps give the bag a very good stability while keeping quick access pockets for all your small objects. It's a certainty, the Rook backpack will never leave you for your mountain hikes! Features: Adjustable torso length Main material: 600D Polyester 15mm compression straps on the sides Adjustable back panel with AirSpeed ventilated trampolines Rope knot attachment point Integrated and removable waterproof cover Internal hydration sleeve Internal compression strap for optimal load Large bottom zippered compartment Lightweight perimeter frame Dual access PowerMesh pockets for water bottles Removable sleeping mat straps Side compression straps Base compartment with internal sleeping bag divider Sternum strap with whistle Top access Double zippered belt pockets Zippered pocket in the hood Weight: 1.59 Kg Backpack Osprey ---Rook 50 Astrology Blue Blue Flame