I have 3 of these bags. Use on the Road, MTB and Gravel. Carries everything you need for on the road or trail repairs. If you need or want to carry more get another bag for another part of your bike. Tucks in nice for a clean look. On the road I like to clip a rear safety light on the back for hi viz.
The bag fits things fine, but the zipper is so hard to open and close. I actually broke the zipper because i was trying to hard to close it that the zipper broke off. Will be buying anew seat bag and will NOT be buying this one again.