Adventure Out Sometimes, you just need the basics. The Flagstaff Hydration Pack has your back with the included 2L hydration reservoir and a sleek, low-profile design that accommodates the essentials. External stash pockets store your quick-access items, with additional internal storage space in the main compartment. Want to pick up the pace? An integrated chest strap keeps the pack in place while you're on the move and adds comfort. Features Includes 2L hydration reservoir Dual-sided hydration ports Main reservoir compartment Quick-access stash pocket Reflective safety accent Sternum strap for added stability Materials 600D 90T Polyester Tech Specs Capacity: 4L / 244 in3 Weight: 1 lb 1 oz / .5 kg Dimensions (L x W x D): 16.93" x 10.63" x 2.36" / 43 x 27 x 6 cm