UltraFlask Speed 500ml Closeout help reduce fatigue and improve

help reduce fatigue and improve the efficiency of your stride

Increases awareness of your body position to help you maintain proper posture and form

it's also suitable for both beginner and advanced rollers

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Designed to replace the removable liner in roomy to moderate-fitting footwear

UltraFlask Speed 500ml Closeout help reduce fatigue and improvePart 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. Style