Nathan Running Hydration Vest Pack Black Yellow Reflective Adjustable Mesh 10044 Nathan hydration vest designed for runners and hikers seeking a lightweight, breathable carrying solution. Constructed with a moisture-wicking mesh back panel and adjustable sternum straps, this pack ensures a secure, bounce-free fit during high-intensity movement. The rear compartment features a bungee compression system for extra gear, while the front straps include multiple pockets for quick access to flasks, energy gels, or a phone. Reflective hits enhance visibility for low-light training sessions. Measurements: • Height: 15" • Width: 9" Measurements done by ai please see the pictures for 100% accuracy. #Waterproof