here's what I carry using this bag. I ride clincher. 2- 80mm Tubes, 4- co2 cylinders, tire boot, 2- park tool tire levers, nano- inflator, and a bontrager multi-tool. The leather tab is great, keeps the bag from wearing through. Also, the way the strap attaches the bag, it prevents the rough velcro from tearing up you nice kit. Lots of bags cause premature wear on cycling shorts. This bag eliminates that problem.