The Origin 5 hydration pack provides five liters of dedicated gear storage to keep you going on half- or ultralight full-day excursions, plus a 2.0L Big Zip SL reservoir to keep you fueled along the way. * Weatherproof Protection: Waterproof, 10,000mm-coated fabrics, welded, all-weather zippers and heat-taped seams. * Integrated Hydration: Dedicated, easy-access compartment for included 2.0L Big Zip SL reservoir, options for top, bottom, left or right hose routing, lightweight reservoir suspension toggles, and locking hose clips. * Clean Design: Precisely what you need and nothing you dont to keep things light and simple. * Refined Fit: BioCurve back panel, plus ergonomic shoulder straps with soft, stretch-woven surfaces and high and low shoulder strap attachment points for long and short torsos, respectively. * Essential Features: Zippered waist pockets internal organizer welded light loop/lash points reflective detailing.