Features of the CamelBak Nano 3L Vest Vent mesh offers multi-directional air flow and cushioning to maximize comfort and breathability Trekking pole carry easily remove or replace trekking poles while running Stretch overflow pocket toss in a rain shell or stash a shed layer in this quick access pocket Secure phone pocket conveniently located for quick access and includes a zipper closure for added security Fuel and gear storage run essentials organization includes pockets specifically designed for quick stow flasks Dual adjustable sternum straps increases stability and offers a range of adjustments for customization