What Our Gearhead(R) Experts Are Saying:"This vest is my go-to for long training runs. It fits snugly and securely, with plenty of storage for gels, gear, and hydration. The ventilated mesh keeps things breathable, and the trekking pole quiver is perfect for steep trail races."When the trail stretches ahead and every step matters, the Zephyr Pro Vest ensures we stay focused on the run, not our gear. Designed for those who push their limits, this vest offers a tailored fit with breathable engineering knit mesh that cools where it counts. It comes equipped with two Quick Stow flasks for 34 ounces of efficient hydration and features ample storage for essentials like gels, a phone, and even trekking poles. Reflective elements add safety during low-light conditions, while ultralight materials make it disappear as we tackle mile after mile. Every detail is optimized for performance, from the adjustable chest straps for a custom fit to the body-mapped mesh zones and a safety whistle for trail peace of mind.