With its 2-in-1 design, the CamelBak® Arete™ 18 50 oz. Hydration Pack is the perfect pack for those trail adventures, mountainous jaunts and everything in between! The Arete™ holds 50 ounces of water and offers storage for extra gear and food. This hydration pack converts into a reservoir sleeve for storage in a larger bag. The Antidote® Reservoir offers simple sipping and refill throughout your journey! FEATURES: Great for mountain biking, trails and day long adventures Ideal for carrying gear, snacks, apparel and more Frameless construction Bag capacity: 16.5L Hydration capacity: 50 oz. CRUX™ reservoir with standard exit port Wide mouth lid snaps on and off with a quarter turn for easy filling and emptying HydroGuard™ technology prevents the growth of bacteria PureFlow™ tube for free flow of liquids Big Bite™ Valve simplifies drinking, and safely seals shut after each sip Lightweight for easy carry 2-in-1 reversible design converts bag into a reservoir sleeve Dual side mesh pockets for storage Removable sternum strap 100% BPA and BPS free Simple to clean and maintain Manufacturer’s Camelbak® Got Your Bak™ lifetime guarantee SPECS: Total Capacity: 16.5L bag 1.5L reservoir Hydration capacity: 1.5L/50 oz. Weight: 1 lb., 10 oz. Torso Length: 13” Back Panel: 70D Nylon Harness: Air mesh Fabric: 240D box ripstop nylon Dimensions: 15.9” x 9.1” x 9.1”.