Immersion Proof Breathers are "free breathers" that permit air pressure equalization, but keep out liquid water.  Immersion Proof Breathers are used on membrane keyboards and similar pressure sensitive equipment that must operate under rain or water submersion conditions. These immersion proof breathers are manufactured with robust materials and finishes suitable for military and defense applications. Products include: Immersion Breathers; Mini-Immersion Breathers; Immersion Breather/Desiccators; and Plastic Immersion Breathers. AGM also offers a complete line of controlled Breather Valves.