Ultraflask 450 ML Soft Water Bottle

Part of the Hydrapak ultra light series, the 450 ml is so light, don't forget you brought it! Weighing in at just over an ounce, it's optimal hydration, no matter what kind of runner you are. Its pliable material conforms to most pockets, it shrinks as you drink to minimize water movement and it can be used with or without the tube. Ultra light weight, ultra useful.