USWE - Vertical Backpack 4LVERTICAL 4L is a lightweight hydration backpack designed for the performance minded, multi sport enthusiast who needs 4L of storage capacity to carry personal gear and hydration. Whether you need a running backpack, skiing backpack, bike backpack, or motorcross backpack the VERTICAL got you covered. Equipped with soft mesh, highly ventilated shoulder and chest straps that allow normal breathing capacity and freedom to move. The lightweight back panel