42mm Filter-Compatible

Take matters into your own hands with the SkyFlask™ 500ml handheld. Designed for the minimalist runner, the SkyFlask is lightweight and easy to hold with an adjustable hand strap for a more precise fit. It has a twist locking cap, high-flow bite valve, and large opening for rapid refills. Your next PR awaits.

Take matters into your own hands with the SkyFlask™ Speed 350ml handheld. Mile after mile, the SF350 is comfortable to hold with an adjustable hand strap. Topped with our SpeedFill™ cap that makes aid station refills a breeze. Boost your performance.

Keep your water cool and prevent bottle sweat. An insulated version of our handheld SkyFlask™ 500ml soft bottle, the SkyFlask IT 500ml features our IsoBound™ technology. Engineered to keep fluids at an ideal temperature 38% longer than a standard flask.

Keep your water cool and prevent bottle sweat. An insulated version of our handheld SkyFlask™ Speed 350ml soft bottle, the SkyFlask IT Speed 350ml features our IsoBound™ technology. Engineered to keep fluids at an ideal temperature 38% longer than a standard flask.

Go big. The largest of our 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 our newest SpeedFill™ cap feature that makes aid station refills a breeze. 

Go big. The largest of our 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 our newest SpeedFill™ cap feature that makes aid station refills a breeze.