Lezyne M-Caddy QR. I really like the QR. I may change all of my seat bags to these. I didn't know this one was going to be so small though. The next size up would have been better for me. However, if you are a minimalist then it should be perfect for you. There is just enough space for all of the essentials. It will hold a road size tube, patch kit, levers and a card pack for any cards you need to bring. It is a little tight though. So if you have a fat road tube and a large patch kit there won't be enough space.
I have the Lezyne M-Caddy QR on both my road and CX/Gravel bike. I love the quick release so I don't have to fiddle with straps and worry about rubbing on the seat post. It holds the necessary gear: co2 holder, extra cartridges, mini-tool, tubeless darts, cash, quick link tool and I forget what all else. Pretty much all I need to not be stranded by the side of the road. It also leaves plenty of space for a light mount, in this case, a Garmin Varia. It would be nice if I could have just a single bag and buy multiple mounts for the saddle, but such is life.
This pack is perfect to put a few essentials on your bike. It's also convenient in that the release from the bike allows you to lock up and not worry about someone stealing your pack.
Good size, reflective, secure.
Easy to remove when locking bike up outside.
