This combined gas and particle filter protects against organic and inorganic acid gases and vapours, sulfur dioxide, ammonia and derivatives. Classified as a class 1 gas and class 3 particle filter, it can be used to protect against harmful substances, solvents, toxic particles and microorganisms. The special Portwest bayonet system ensures a more secure connection between the mask and the filter. This filter is compatible with the P420, P430, P421, P431 half masks and with the P500 model full face mask.
