The Dakine Session 8L Hydration Backpack is a minimalist, yet full-featured pack combining the cooling comfort of a breathable Air Flow back panel with airy shoulder straps. This narrow, lightweight pack features a 2-litre vertical hydration reservoir with a Phaser bite valve. The pack offers plenty of storage including an organized front pocket, a fleece-lined sunglass pocket and external attachment straps. The Session is a do-it-all bike pack to keep you out all day on the trails.Dakine Session 8L Hydration Backpack Features2L / 70oz Hydrapak® reservoirPhaser bite valveBreathable Air Flow back panel and shoulder strapsExternal attachment strapsFleece-lined sunglass pocketInternal organizer pocketsSafety light attachmentIntegrated rescue whistle/sternum strapDakine Session 8L Hydration Backpack SpecificationsVolume: 488 cubic inches (8L)Dimensions: 17 x 7 x 3 (43 x 18 x 7cm)Weight: 1.2 lbs. (.56kg)100% 450D ripstop recycled polyester (rPET) exterior\"