Never used. Freezable bladder and rain guard included. Offers welcome. Description From website: “Contoured, softly padded shoulder straps covered with breathable Wide Air-Mesh. The round, durable spring steel frame is extremely lightweight and flexible. It tensions the mesh and provides fantastic freedom of movement and a perfect fit. Side compression straps on the hip belt stabilize the pack. The System is a fantastic comfort combination: the back mesh guarantees excellent ventilation since air can pass through without restriction; the floating, ergonomically formed Vari Flex hip belt follows each and every movement and thus helps save energy. Ultra-flat shoulder strap anchor point with ventilation holes. Stabilizer straps allow exact positioning of the rucksack. Size H x W x D: 66 x 32 x 24 cm. Volume 34 liter.