Mammut Aenergy 12 ultralight hiking backpack - made for short one-day adventures and combines breathable, ergonomic shoulder straps with sufficient back padding for maximum comfort. This sports backpack is compatible with a hydration system with a outlet in the shoulder straps, which is not part of the backpack. * volume: 12 L * material: 100% polyamide * dimensions: 17 x 46 x 23 cm * back length: 46 cm * light backpack, weight 280 g * sustainability Fair Wear * DWR finish PFC-free * made of 70-100 % recycled materials * main pocket with two-way zip, inside compartment for water bag with outlet for shoulder straps (bag is not part of the backpack), and one small zipped pocket with carabiner for keys * front mesh open pocket with the option of pulling the elastic cord * wide shoulder ergonomic straps * lightweight construction * two mesh pockets on the shoulder straps suitable for storing soft silicone drinking bottles * slightly reinforced and breathable back panel * loop in the upper part * height-adjustable chest belt * non-reinforced waist belt * outdoor, hydro backpack