Specifically designed to make your daily trips to the supermarket or farmers market as easy as possiblethe ql2 mounting system allows for the bag to be quickly and easily taken on and off the bike hassle free plus as you go into the shops and edge protector for attaching the ortlieb carrying system optional accessory which also helps increase the bags stability in usethe qsc quick seal closure system allows extremely easy access into the bag and keeps it watertight when closed to protect y