One popular member of the Mountain High family of products are the, FAA-CAMI tested with the EDS-ip system, MH ALPS FaceMask and the MH ALPS-M (for microphone) FaceMask. The ALPS-M is outfitted with an electronic "Clear-Speak" ambient noise-canceling microphone that enables pilots to fly with safety and comfort with clear, crisp voice communication and is compatible with most aircraft systems. The mask is easy to put on and exceptionally comfortable as it does not require a polyvinyl bag. The ALPS or the ALPS-M FaceMask can be used with any of the MH oxygen systems, constant flow or EDS.
The constant flow mask is also compatable with most other constant flow systems that incorporate a flow meter.
Microphone can be exchanged from one ALPS mask to another or easly added to a non microphone ALPS mask.