These filter classes are minimum requirements and simply serve as a guide. It is the wearers' responsibility to make sure the breathing apparatus conforms to the requirements in terms of hazardous materials and concentration before use! FFP 1: for particles that are neither toxic nor associated with fibrosis. For protection up to 4 times the corresponding threshold limit value. Highest safety (certified according EN149). Anatomical design and soft material-edges; avoid bruising to the face. Compatible with safety spectacles because of the safe optimised nose-area. Seamless; continuous headband for comfortable and secure mask fit. Innovative shape-optimised design. Circulatory venting via the soft edges; prevents fogging of safety spectacles. Colour coding.