The respirator features a unique, contoured T-profile sealing edge for superior fit, while a sweat port in the chin pocket provides added comfort during extended periods of wear. The special inner mask reduces CO2-content (< 0.5%) within the mask to a minimum, thereby decreasing user fatigue. Promask incorporates a wide panoramic visor to maximise the field of vision and a front mounted speech diaphragm for easy communication with colleagues. The design prevents the visor from misting by directing the airflow across the visor. The positioning of the filter reduces the likelihood of neck strain and permits good downward visibility.