Ultraflask+ Filter Cap Size:42mm and odor resistance of Merino

and odor resistance of Merino with the comfort of an interlock knit

and buttery soft

Materials Performance mesh upper with overlays for added durability

Strut onto the field (or barstool) like the MVP you were born to be

The powerful and patented MirageDrive with Glide Technology and Kick-Up Fins allows for smooth sailing in all conditions

Ultraflask+ Filter Cap Size:42mm and odor resistance of MerinoRun fast, filter faster. The UltraFlask+ Filter Cap threads seamless onto all of HydraPak's 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.*Effectively removes common waterborne bacteria, such as E. coli (99. 999%) and parasitic cysts (99. 9999%) per HSF 42.