The signal whistle is perfect for alerting people nearby or calling for help. Signal Whistle: On the trail, you are our number one concern.Reflectivity: Multiple high-visibility reflective areas ensure you can run safely even after the sun goes down.Snack and gear storage: Enough room for all your snacks, water and running essentials.Stretch exterior pockets: Perfect for all the extras you need on the go.

Dual Adjustable Chest Strap: For an easily adjustable fit that provides all day comfort.Secure Cell Phone Pocket: Keep your phone handy and close to you with the easy-access cell phone pocket.There are men's and women's specific designs, each designed to target which areas of your back get hot. Functional knit mesh with body mapping technology: body mapping technology has been incorporated into the mesh design.Stowable and fully removable trekking pole quiver: allows quick and easy access to your trekking poles while running.Features of the CamelBak Zephyr Pro Running Vest The Zephyr™ Pro hydration vest provides what you need when you need it most, so you can focus on what matters most: testing your limits and achieving peak performance. CamelBak help you prepare for any challenge, whether it's the run of your life or a multi-day long run.

Zephyr pro