To enable athletes to fill up on hydration without risking their health, Hydrapak has developed the 42MM FILTER CAP, a unique filter cap.

Perfect for extended expeditions, this filter cap filters bacteria and protozoa from natural springs, so you can drink healthy water safely and easily without taking large quantities of water with you.

Easy to use, it is compatible with Seeker water pouches and Flux flexible bottles with a 42 mm opening.