The Vertical 4 features a 4-liter total pack volume with multiple internal pockets for carrying essentials, as well as an external bike light attachment point. The pack is designed with soft mesh straps and and a breathable back mesh panel, with a 4-point NDM harness system keeping the pack in place without restricting breathing. A 2-liter Hydrapak Elite hydration bladder lets you expand your water capacity and features an easy-to-use Slide-Seal top, Plug-N-Play coupling, and an internal compression sleeve to keep the bladder secure. The Vertical 4 is built to provide hydration, essential storage, and unbeatable comfort, with a lightweight, secure design that won’t hold you back.