Product Details     Style: ARETE 18 2022 The ultralight CamelBak Arete 18L with 50oz Hydration Backpack is a perfect addition to your larger multi-day backpack. It features compressible material so it can work on its own for short hikes or easy to pack away for longer adventures on the trail. Folded in on itself it serves as a hydration sleeve, making it easy to get refreshment on the trail and protecting your reservoir from your pack contents. When it's time to make a break for the summit or just leave camp for lunch it opens up to give you 16.5 liters of space for extra layers, a camera, or a sandwich while still keeping the convenient 1.5L reservoir close at hand.KEY FEATURES 3D Vent Mesh Harness is lightweight and breathable Adjustable Sternum Strap offers a range of adjustments for a custom fit Lightweight and breathable materials designed for all-day comfortSPECSVolume (Liters): 18 Dimensions: 17.72" x 9.45" x 8.66" 16.5L of cargo space capacity/1000 cubic inch Includes 50 oz (1.5L) Antidote® Reservoir 11 oz approximate empty weight (320 g) FEATURES Side Stretch Pocket expands for quick access essentials Convertible design works as a lightweight summit pack or insulated hydration sleeve inside another pack Secure phone pocket for easy access Laptop Sleeve keeps your laptop protected Durable 240D Ripstop Nylon construction is lightweight yet resists abrasion and tears CamelBak Arete 18L with 50oz Hydration Backpack