Deuter Amager 25+5

"The Amager 25+5 from Deuter is the perfect companion for the urban jungle and anyone who values versatility. This waterproof backpack with a volume of 25 liters, expandable with a practical roll closure, offers enough space for work and leisure. Whether on the way to work, mountain biking or on a bike touru2013 the Amager 25+5 adapts to any situation."
"Particularly noteworthy is the Airstripes back system, which ensures maximum air circulation and comfort. The ergonomically padded shoulder straps and stowable hip fins take the strain off the back, even on longer tours. An infinitely adjustable chest strap provides additional support, while reflectors improve visibility in poor light conditions"
"Inside, the backpack offers well thought-out organization options: a laptop compartment for devices up to 15 inches, an inner compartment for valuables and a zip-in organization unit for tablets and documents. There is a practical smartphonepocket on the side. Loops for a helmet holder (helmet holder not included) round off the features and make the Amager 25+5 the ideal companion for anyone who wants to be well organized on the go."