Source

Spinner Pro Race Hydration Pack - 3 liter

The Spinner Pro Hydration Pack is made out of lightweight materials with and aerodynamic and aerodynamic fit for those long days in the saddle. The 3L (100oz) Spinner Pro features a zipper pocket for  keys, or gels, and the Source quick connect tube and Helix valve. As with all Source bladders, it uses a triple layer odor and taste free film.

The Race version add 6 addition liters of cargo space over the Spinner Pro.