Mounted with strong velcro stops on the saddle hangers and seat post and is therefore also ideal for MTB where you could otherwise break a plastic fitting.

With mounting for light with clip mounting.

Semi-rigid underside and ends that ensure the bag keeps its shape.

Tight-closing zipper.

The size is S and fits e.g. really good for:

1 racer tubes, multitool, patch tool, small Co2 pump and 1-2 cartridges.

(The above is an example. Depending on the sizes of various items, there may be a little more in there).