CAMELBAK ARETE 18 HYDRATION BACKPACKWith its lightweight materials and reversible, double-duty design, the Arete 18 is one of the most versatile packs that CamelBakmakes. When you're not wearing it, it reverses into an insulated reservoir sleeve-perfect for holding your water supply steady inside a larger pack. Ready for a quick hike? Just flip it right side out, and you've got room for snacks, layers, essentials, and 1.5 liters of water. Its lightweight materials and packable design also make it an excellent travel bag that won't add bulk to your luggage. Theyupdated this version of the Arete with additional pockets to keep your gear organized, along with a removable sternum strap.FEATURESFeatures the brand new Crux which delivers 20% more water per sip, with an ergonomic handle for easier refilling, and an on/off lever that makes it easy to prevent leaksReversible design converts into an insulated reservoir sleeveUltralight and compressible materialsRemovable sternum strap for a custom fitSecure zippered pocket for essentialsTECH SPECSBackpack Capacity: 18LHydration Capacity: 1.5L/50 fl ozDimensions: 35.5 x 19 x 19.5 cm / 14 x 7.5 x 7.7 inBack Panel: Padded MeshPack Weight: 301 g/0 lb 10 ozTorso Fit Range: 30-40cm/12-16 in