People say this pack is small - which is true - but you can still pack a surprising amount of gear in it if you pick carefully. I keep a tube, Crank Brothers F15 multitool, folding SwissTech pliers, one CO2 cartridge, tire levers, patches, glue, master link, oil, pedal spike, tire boot and a small light for night repairs. Normally I don't use Tubolito tubes but I have one in here because it's very compact. My inflator detaches from the Blackburn CO2'fer pump, so that conserves space. The pack is very well made and extremely secure.