The Circuit Vest puts you in control of your body, so you can focus on self-discovery and personal bests. Crux reservoir keeps things flowing, and the trekking pole attachment helps keep you steady on your path. While our women's specific design ensures that every mile is comfortable. This vest is the perfect companion to your weekend adventures. It's lightweight, stretchy, and breathable so you can focus on what really matters: running and getting lost in the woods. Women Specific Fit: our women's vests utilize body mapping technology for a tailored fit and excellent cooling, including an S-curved shoulder harness for comfort and stability.3D Vent Mesh: Engineered to maximize airflow and comfort throughout your run.Secure phone pocket: Keep your phone close to the vest and close to you with our easy-to-access phone pocket.Dual adjustable chest straps: for a easily customizable fit, ensuring all day comfort.Tube Trap: Allows you to grab the hydration tube without having to unbuckle or unhook, for easy, on the go hydration.Fuel and Gear storage: Just enough room for all of your snacks, water, and running gear.Trekking pole attachment: Keeping your trekking poles secure and close at hand for when you need to steady your feet.Reflectivity: Various points of intentional, highly-visible reflectivity to keep you safe on your run as the sun goes down.Safety Whistle: On the trails you are our number one concern. The safety whistle is pefect for alerting people you're near or calling for help.Ultralight Materials: This means "no unneccessary baggage" for your trek, so you can run all day in comfort.