7700 half-mask made of silicone guarantees highest comfort of use and durability. It is made up of a face part, fastening band, screwed joints and exhalation valve. It is available in three sizes: small, medium and large. The appropriate filter and/or absorber should be selected for the half-mask depending on the type of contamination and its concentration. The product falls within category II of personal protective equipment. The product conforms to the following standard: EN 140.