Go big. The largest of the ultra-light series, the UltraFlask Speed 600 ml holds more so you can go the distance. Its soft material allows it to fit snugly in most vest pockets and it shrinks as you drink to minimize water movement. Topped with a new SpeedFill™ cap feature that makes aid station refills a breeze.
SPEEDFILL CAP
Designed for fast filling - flips open for quick refills and snaps closed for a leak-proof seal.
VEST PACK FIT
Soft material conforms to most hydration vests, belts or pack pockets, makes a great addition or replacement running flask.
