The large porteur bag for on the porteur rack.
Lots of groceries fit in, courier packages, or camping stuff.
With two large side pockets for lock, spare tubes, bottle, light battery and so on.
There are 2 ways to go: two rear hooks seize under the carrier and pull him over the handlebars with a wide velcro closure, it’s perfectly secure. but the hooks can, yes, hook in a shopping cart, annoying and not allways is the handlebar or rack suitable. second option is to go for slide on rear part rack and than strap to handlebar. this works well enough.
Shoulder strap turns into a short belt with one click , so that the bag is better to lift when it’s full with heavy groceries.
dimensions: 40 x 34 x 31 (b x h x d)