Hydrapak UltraFlask+ Filter Cap Electronics like your smartphone

like your smartphone

Strutted vents in the fly for excellent air circulation

Full-length side zippers

100% polyester tricot lining at palm - Radiant Fleece™ 95% polyester

Hydrapak UltraFlask+ Filter Cap Electronics like your smartphoneRun 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. FILTER FACT SHEET FILTER USER MANUAL *Effectively removes common waterborne bacteria, such as E. coli (99. 999%) and parasitic cysts