CamelBak: At the zenith, you'll find the Zephyr™ Limited Edition Vest. Full features include the ultralight 2L Fusion™ Reservoir. When you need unmatched performance for ultra-long-distance runners and races with demanding gear requirements, the Zephyr™ Vest will have you equipped with hydration, nutrition, and other essentials to see you through to the finish line.The Zephyr™ Vest is engineered with body mapping tech for all-day cooling comfort. Durable, dual adjustable sternum straps supply flexibility and comfort so you can focus on the epic adventure ahead. you'll be happy when it rains, as the dimension Polyant LS07 sailcloth provides protection so you can keep striding toward the finish. Hydration is only a sip away in the new Fusion 2L Reservoir with trusty TRU® Zip waterproof zipper for easy access in any conditions. Stow crucial calories and tech easily in our secure phone pocket and stretch overflow pockets. Be safely seen and heard thanks to the high reflectivity features and safety whistle. Made with safer chemicals, earning the Repurpose Green Sustainability Badge. FEATURESUltralight and durable Dimension Polyant LS07 sailcloth provides protection.Includes the new Fusion 2L Reservoir with TRU® Zip waterproof zipperAdjustable Sternum Strap: Offers a range of adjustments for a custom fit and increased stabilityFuel and Gear Storage: Organize run essentials with pockets specifically designed for Quick Stow flasksReflective Accents: For better visibility in low light environmentsSecure Phone Pocket: Conveniently located with a zipper closure for secured quick accessStretch Overflow Pocket: Quickly stash or shed a layer or rain shellTrekking Pole Carry: Easily remove or replace poles while runningPolygiene® antimicrobial materialSafety whistle: Extra assurance in case of an emergencyQuick Stow flask compatible (does not include Quick Stow flask)