HydraPak 42mm Filter Cap Alpine glasses and durable for the all-around

and durable for the all-around mainstream backcountry skier

ideal for keeping climbers warm when you're up high

At just 37 grams per metre

Fits round

75 litres per minute

HydraPak 42mm Filter Cap Alpine glasses and durable for the all-aroundOn the go Water Filtration. Overview Filter water on the go. The new 42MM Filter Cap threads seamlessly onto all sizes of HydraPaks 42MM threaded Seeker water storage bags and Flux flexible bottles morphing them into filtration solutions. The end result being lightweight filtration kits that can either be used to squeeze filtered potable water into other camp bottles and containers or to drink freshly filtered water from a Seeker, Flux, UltraFlask or