Nathan Grit

Backcountry.com says:
The Grit Hydration Race Vest from Nathan is exactly the tech you need to help your trail running or road-racing reach new heights. The 3-way Propulsion Harness comfortably distributes your load and provides a bounce-free ride, even over rough terrain. Mesh shoulder straps offer breathability and, with the slide-adjustable chest strap, ensure a comfortable, secure fit all day. A variety of external and internal pockets give you places for a water bottle, gels, and any other snacks or essentials you want close at hand throughout your run.