Hydrapak 42 MM Filter Cap

The HydraPak 42 MM Filter Cap is a compact trail companion for camp, travel, and big miles on the move. Made for HydraPak 42MM thread storage bags and flexible bottles, it helps keep fresh water within reach with less fuss and less bulk.

42 MM Filter Cap For Lightweight Trail Hydration

At just 57 grams, this cap keeps pack weight in check while still delivering dependable filtration. It threads onto Seeker 1L, 2L, 3L, 4L, and 6L bags, plus Flux 750 mL, 1L, and 1.5L bottles, for a streamlined drinking setup on the go or for filling other containers.

Fast Flow And 42MM Thread Compatibility

This HydraPak cap is built for quick sips and simple use on the trail:

• High-flow drink nozzle opens and closes with one hand for quick access.
• Dust cover helps protect the bite valve between sips.
• 42MM thread compatibility works with Seeker 1L, 2L, 3L, 4L, and 6L, plus Flux 750 mL, 1L, and 1.5L models.
• Fast filtration removes 99.99% of E. Coli and parasitic cysts at more than 1 L per minute.
• Long-lasting performance filters up to 1,500 litres of water.
• BPA and PVC free construction supports cleaner hydration gear.

For runners, hikers, and campers, the HydraPak 42 MM Filter Cap adds a compact, reliable water treatment option without extra bulk. Shop the cap at Foveo Running and keep compatible HydraPak bottles and bags ready for the next outing.