Sette Quest QR Clip-On Expandable Seat Bag
The Quest Expandable Bag features an expanding pocket. This allows enough room to store a tube, tools, food and more. The quick release buckle mount attaches securely to saddle rails. Made from tough 600D nylon, polyester and formed Eva molding adds the reliability needed to secure trail side necessities.
I gave this two stars based on the compartment size. You can definitely store a lot. Tools, tubes, kits, etc. Con, the clip snapped off on my first trail ride. Not very rugged and not waterproof.
You can fit anything in here
the fabric seems pretty resistant. has enough space for carrying the essentials tools, and if you need more you can unzip it and get more space!!! the clip on system seems secure, with the extra velcro making it even more!.. the only con is that lacks of a place to hang your tail light, but thats it...