The streamlined Black Diamond Octane pack features an advanced suspension and thoughtful features, making it an excellent choice for day hikes, off-trail scrambles and fast-pack excursions. - Revolutionary ergoACTIV suspension and 3D mesh-lined shoulder straps and hipbelt enable athletic movement and all-day comfort while traveling through varied, broken terrain - Zippered panel opening allows easy access to all of your gear for daylong adventures - Internal hydration sleeve holds a reservoir (sold separately) to let you hydrate on the go - Hipbelt stash pocket, front compression stretch pocket and side stretch pockets provide plenty of storage for water bottles, snacks and rain gear - Tool loops and compression straps accommodate trekking poles and an ice axe - The Black Diamond Octane pack is constructed of 210-denier ripstop nylon and 400-denier nylon twill for light weight and excellent durability