You can easily fit two tubes, tire levers, a patch kit, and a multitool, in the Anatomico Roller Saddlebag, but SciCon gives you the option to expand it from 820cc to 1610cc in volume. In its larger form, you can also easily hold energy bars, snacks, a telephone, and other personal items. Its versatility doesn't stop there either. You can strap a small air pump or foldable tire on the outside of the bag too. The Anatomico Roller Saddlebag attaches to the saddle using the lightweight, quick release SciCon Roller system. It is available in black and reflective silver.