The Camelbak Zephyr Running Pack is lightweight and engineered with body mapping for optimal ventilation. Made with dual adjustable sternum straps which offer a range of adjustments for a custom fit and increased stability, along with fuel and gear storage via multiple stow options which are easily accessible. The secure phone pocket keeps your phone dafe and easy to access. Relectivity for nighttime activity. Other features include a stretch overflow pocket, a trekking pole attachment, Polygiene antimicrobial technology and a safety whistle. Reservoir compatible (not included). Dual exit tube routing. Capacity: 2 x 0.5L Colour: Grey Material: 100% Polyester Code: 2203001000