HydraPak UltraFlask Speed 500mL sock High-end running features help you

High-end running features help you meet your potential

No synthetic ingredients

It's lightweight

These aerodynamic

you tap into the full potential of compression tights and your workouts benefit from that extra push

HydraPak UltraFlask Speed 500mL sock High-end running features help youPart of our ultra light series, the 500 ml is so light, you might forget you brought it. Weighing in at just over an ounce, its 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. Topped with a new feature, the SpeedFill cap, makes aid station refills a breeze. Ultra light weight, ultra useful. Fits