A dream for ultra-long distance runners and fast-packers, Zephyr Vest is engineered with body mapping for optimal ventilation and designed to perform for your specific pursuit. Its lightweight and maxed out with safety features. Theres a secure cell phone pocket, built-in safety whistle, and attachment point for your trekking poles. Hydration at the ready with two Quick Stow flasks at the front of your vest for easy access. And since youre always on the run, the ultra lightweight material is treated with Polygiene antimicrobial to keep bacteria at bay from one stretch to the next. FEATURES Engineered Knit Mesh: Light and breathable material made with body mapping technology to ventilate areas of the body that generate the most heat Dual Adjustable Sternum Straps: Offers a range of adjustments for a custom fit and increased stability Fuel and Gear Storage: Multiple stow options, easily accessible Secure Phone Pocket: Keep essentials safe and easy to access Reflectivity: For low light safety Stretch Overflow Pocket: Quickly stash or shed an extra layer Trekking Pole Attachment: Easily attach and remove poles when needed Polygiene Anti-Microbial Safety Whistle: Be heard in case of an emergency Reservoir Compatible, not included Dual Exit Tube Routing Made with Ultra Light Materials