The PA90 series PA94 is a self-contained breathing apparatus (SCBA) made by Dräger. The example pictured uses a PA90 type A (PA90A) lung demand valve with a Dräger Panorama Nova EPDM P face mask (Part No. R 52972) made from EPDM rubber (ethylene propylene diene monomer rubber). The duration of breathable air depends on the size of the compressed oxygen cylinder used.