Ortlieb
Microbag Saddle Bag - 0.5L

If all you need are the bare essentials, then grab the Saddle-Bag Micro and get on your bike. The roll closure with elastic bungees make it 100% waterproof. Two screws make for a simple fix. An ultralight Saddle-Bag with minimal dimensions. With the click closure, it‘s a breeze to quickly add or remove from under the seat with just one hand. The perfect Saddle-Bag for cyclists looking for minimal weight.

Specification:

Fabric: PS21/PS21R
Height: 7cm
Width: 12cm
Depth: 12cm
Volume: 0.5L
Weight: 120g