Run like a professional with this VaporAir 2.0 7 Liter Men's Hydration Pack, voted #1 by Outside Magazine as the "Market’s Best Overall Hydration Vest." Fit is key to avoid chafing while you run so with our Adaptive-Fit™ adjustable sizing system you can have the perfect lightweight, body mapped pack. Store all of your essentials with multiple pockets and stay hydrated with the 2L bladder with quick release valve. When you are properly equipped, long runs will never be the same. PEAK PERFORMANCE With the lightweight, chafe-free and breathable materials, this bounce free vest can store all of your running essentials with different storage pockets. Stay hydrated with the 2L bladder and front storage pockets that can fit more bottles! COMFORT FIT Talk about the most secure tailored fit! The Adaptive-Fit adjustable sizing system allows for the perfect tailored, body mapped fit for all men's body types.