Innovative, 100% waterproof 2-in-1 backpack bicycle bag made in Germany in a straightforward, timeless design for commuting or touring. The 27 litre rolltop backpack is very spacious and comes with a padded back, ergonomic shoulder straps and chest strap and can be transformed into a bicycle pannier bag in no time. The shoulder straps are stored in a mesh pocket on the back of the backpack and secured with the fold-down front cover. This has a slip pocket with waterproof zip and is completely removable for cleaning. Thanks to the proven QMR 2.0 mounting system, the Proof Transformer 2-in-1 backpack bicycle bag is securely attached to the pannier rack (with round tubes from 8 to max. 16 mm) and can be quickly released on the strap that connects the two hooks. The QMR hooks are equipped with a small U-lock (e.g. TSA II, item no. 45306 or Abus 145/20, not included) lockable. The backpack and bike bag combination offers plenty of storage space with a well thought-out interior: a padded laptop compartment for devices up to 13.3 inches with external additional slip pockets for smartphone, pens etc. Depending on the load, the 2-in-1 backpack bicycle bag can be compressed sideways in 3 steps. The robust bag material in textile look is welded in the VAUDE factory waterproof and is completely PVC-free. Reflective logos.