The Osprey Raptor LT 12 L Hydration Pack is a hydration-ready pack for bike riding. City or trail, this pack hauls plenty when you're in the saddle. It all begins with the hydration-specific zippered sleeve and the included Hydraulics 2.5 L reservoir to keep you hydrated while on the move. The 12 L pack capacity with internal organization makes it easy to carry bike tools, snacks, and various layers. Equipped with a blinker light attachment (light not included) and a reflective logo, you'll be noticeable in low-light situations.