Brand new with tags, Black Diamond 4 hydration vest in official yellow. 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 f i t while on the move.