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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. It's lightweight and maxed out with safety features. There's 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 you're always on the run, the ultra lightweight material is treated with Polygiene® antimicrobial to keep bacteria at bay from one stretch to the next. Women's specific fit. The Zephyr running vest includes two 500ml Quick Stow Flasks for hydration on the go, front storage pockets for gels and fuel, a secure zippered pocket that fits most phones, and reflectivity to keep you visible when you’re on the move. The two fully adjustable sternum straps guarantee a snug, bounce-free fit that won’t constrict your breathing when you’re panting through a hilly workout.