HydraPak Ultraflask 42mm Filter Cap bis_hidden Back Pad 100% Polyester (recycled)

Back Pad 100% Polyester (recycled)

Weight - 93g or 3

Generous 475ml capacity for more of your favorite hot or cold drink

Filters at >1L/minute

80 Denier GORE-TEX Pro Most Breathable Technology across the shoulders

HydraPak Ultraflask 42mm Filter Cap bis_hidden Back Pad 100% Polyester (recycled)Filtration For Runners Overview Run 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. *Effectively removes common waterborne bacteria, such as E. coli (99. 999%) and parasitic cysts (99.