FEATURES: Lightweight, breathable air mesh construction Removable sternum strap allows for a customized fit and ideal stability Side stretch pocket fits typical sized water bottle and other essentials External zipper pocket perfect for keeping essentials safe and easy to access Stretch overflow pocket lets you shed an extra layer or stash anything gear to stay hands free Tube trap keeps your tube secure and helps prevent leaking Cargo compression pockets provides convenient storage for all of your required gear Removable hydration reservoir provides more space for additional gear