Mountain Designs Outrace Flask 500 mL Clear 500 mL

Perfect for active adventures including day hikes at pace, trail running and enduro-adventure racing, the Outrace 500mL flask keeps you hydrated on-the-go. Lightweight, soft and flexible, it shrinks as you drink to reduce water bounce. The easy-flow bite valve ensures easy sipping, while the transparent design with measurement markers means you always know how much liquid you have left.