Engineered for long distance races and fast-paced adventures, the Gen 2 Distance 4 Hydration Vest has a running harness suspension made from stretchy, comfortable material that extends from the sides to the back panel with self-bound stretch mesh edges for ultimate comfort on the move. An over the shoulder Z-Pole carry system can be easily deployed on the go, while high stretch side panels extend from the harness itself for an improved fit while on the move. This harness design also provides quick-access side pockets. Lighter colorways provide temperature regulation and better visibility. Dual flask pockets fit two BD HydraPak® SoftFlasks™ - which are included with the vest - while a zippered chest pocket, lumbar and back zip security pockets and small stash pockets provide ample storage for essential supplies.