BLS 5400 optically correct panoramic visor silicone DIN40 class 3 full face maskThis mask has been developed not only to protect the user's respiratory system, but also the entire surface of the face as it is tested to class 3 which offers greater resistance to flame. To safeguard one's health when working in working environments in contact with particularly harmful substances, it is essential to use the right devices, which is why BLS has based its entire philosophy on the design and production of excellently performing