High Performance/Impact Engineering Thermoplastic
The MOD-1 purchased with a balanced SCUBA 2nd stage demand regulator. If your mask was not supplied with a KMDSI regulator installed by the factory, you will need to have an acceptable regulator installed in the pod.
The mask should only be used for surface-supplied diving by divers trained and qualified in surface-supplied techniques and procedures. A fully functional emergency gas supply system and body harness must always be used when diving the Mod-1 or any of the KMDSI full-face masks models in the surface-supplied mode. When using this mask in countries that conform to CE standards the mask must only be used with components that have been CE certified. The maximum recommended recreational diving depth for the Mod-1 with open circuit scuba is 130 FSW (39 msw).