42mm Filter Cap Color:One the Field Issue is waterproof

the Field Issue is waterproof with a IPX7 rating and fogproof with nitrogen-filled internal chambers

Polycarbonate PU membrane with 13% biobased content with a tricot backer

ripstop upper

Reinforced shoulder straps for increased carrying comfort

Real Time Heart Rate And Calorie Tracking

42mm Filter Cap Color:One the Field Issue is waterproofFilter water on the go. The 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 SkyFlask. Both deliver fast and easy