Hydrapak Ultraflask+ Filter Cap size-s-m or the treadmill for some

or the treadmill for some good old-fashioned training miles

smooth ride from landing to toe-off

5-layer hardshell

Wide (2E) Width

Cushioned with PWRRUN foam and built with tough grip underfoot

Hydrapak Ultraflask+ Filter Cap size-s-m or the treadmill for someRun fast, filter faster. The UltraFlask+ Filter Cap threads seamless onto all of HydraPaks 42mm running flasks and handhelds for a lightweight, straightforward filtration solution. Featuring a traditional bite valve and cap design, runners can drink freshly filtered water directly through the high flow Blaster valve. LIGHT AND COMPACT Minimal design and lightweight materials make this filter the ideal choice for runners. It takes up no extra space