Review on LEZYNE Caddy QR Rail Mount Bike Saddle Bag - Compact, Water Resistant, Bicycle Seat Bag by Mark Toth

So far I'm quite happy with this bag under the seat. The main reason I bought this bag was that it only hangs from the rear seat rails and doesn't have a stabilization strap on the seatpost. My old stick strap bag would get in the way of my seat post. This bag feels pretty sturdy and attaches to the seat rails fairly securely. The bag is very compact, maybe even bigger than I expected based on other reviews. What I have in my bag: a 27.5+ tube with air squeezed out, 2 plastic mounts, a set of Skab patches, a Master Link and my multi-tool in the bottom pocket. The bag is full of so many things. No more room for a CO2 blower or anything else. As far as the absolute basics go, it will get me through most local trips along with a frame-mounted mini-pump. Build quality seems pretty decent. The sewing is good, the material is strong enough, the clasp is strong.