The ultimate pack for assaulting the backcountry. Attach the [ak] 2L Canteen to the shoulder harness and keep your iPod , an extra layer, or anything else essential within easy reach. Vertical board carry prevents the tail of your board from banging against your legs for fatigue-free, balanced hiking. Sternum strap with attached safety whistle. Fleece-lined goggle/sound pocket with a headphone cable port. Internal shovel, pole, and probe storage. Hydration compatible. Double cushioned, ergonomic shoulder harness and back panel. Volume: 1220 cu. in. (20 L). Dimensions: 21 x 11 x 7 (53 x 28 x 18 cm).