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

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

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

360-degree sun protection

Our Free Range Fleece Vest is a no-frills base layer or cool day warmer

contoured design of the Snagless Slotted Padeye looks great and has no snag points

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.