Dakine Session 12L  Peatland Hydration Bike Back pack is a full-featured pack combining the cooling comfort of a breathable back panel with airy shoulder straps. This narrow, lightweight pack features a 2-liter vertical hydration reservoir with a bite valve. The pack offers plenty of storage including an organized front pocket, a fleece-lined sunglass pocket, additional side pockets plus an external helmet carry system. The Session is a do-it-all bike pack to keep you out all day on the trails.