Used on my mountain bike and holds all essential tools and more. Very well made as well.
Love the simplicity of this bag. You wont be carrying much in this guy, but it works perfectly for your cycle essentials. Recommend.
Fits well under the saddle. It's pretty compact so you won't be able to put your snacks in it but it fits spare tube, multi-tool, couple canisters of CO2 and a patch kit.
I have purchased many seat bags in the past. Some tear, some the Velcro dies. Some the zipper dies. This bag is the right size and durable. Have 3 now for each of my bikes