This rack top bag sits at the back of the bike, it’s water proof and rugged
Opening and shutting is is with large plastic buckles that can be used with heavy gloves on. These buckles are similar to cycle helmet strap buckles
To hold the bag firmly in place there are four velcro straps, one at each corner. These seem to work well, don’t come undone with weight or vibration
Internally there is a pull cord and liner around the top. All Carradice bags are finished by hand in a factory in Lancashire and this one was made by Kelly, as you can see on the label!
In the real world of rides in the rain (and hail) this British made bike luggage copes fine with all weather