The Osprey Men's Syncro 12 Hydration Pack is the ideal pack to carry a full day of gear in hot and humid climates. When you're pedaling under the sun, staying cool is a priority and the Syncro 12 delivers with a 3D-tensioned "trampoline-style" AirSpeed back-panel, Osprey's highest level of ventilation. Enjoy a contoured mesh back-panel that keeps things extremely comfortable and bike-specific shoulder straps curve to mimic the position you assume when reaching for your handlebars, providing superior fit and stability while you ride. This pack includes a 2.5-liter reservoir that makes certain you don't go thirsty and an integrated removable rain-cover ensures weather won't rain on your parade. The Osprey Men's Syncro 12 Hydration Pack has the features and comfort that match your expectations of a top-tier mountain biking pack.