Vaude aqua back plusvaudes aqua back plus is a pair of lightweight rear pannier bags made of eco friendly fabrics there is a total capacity of 51l giving you plenty of space for your gear waterproofthere is a roll closure that offers a way to customise the bags size and seal it so that its waterproof an outer welded pocket and inside pocket allows you to organise items separately securedthe qmr 20 system ensures the panniers are secured to the left and right sides of the rack it is also