Sawz Waterproof 4 Compartment & Pocket Clip On Under Seat Bike Saddle Bag (Gray)

The bag is made from quality materials and is spacious. I could not however use it on my bicycle seat. You have to pay close attention to the spacing necessary to fit under the seat and where it attaches to the girders. I had to return mine because of the fit, but feel the bag would have been very nice had it fit on my seat.

Perfect size. Stores my extra tube along with other items.