This waterproof rear pannier with large, highly reflective print is made from robust, PVC-free tarpaulin at the German VAUDE site near Lake Constance using a high-frequency welding process. It can be individually adjusted to just the size you want with its roll closure and is absolutely watertight. An inner compartment with small zip mesh pockets ensures clear organization. The bike bag is attached to the rear gear rack with the QMR 2.0 system and a sturdy back panel. Just pull the strap connecting the two hooks to conveniently open the system. The system can be secured with a small lock (such as the TSA Lock, not included). It can be easily adjusted with a dial and is completed by the fully adjustable lower rail hook. A practical shoulder strap makes it easy to carry when you're walking. For commuters who are making their way home after dark, this highly reflective bike bag is a must have for the daily journey to the office.