P952 is A2P3 type combined filter. Classified as a class 2 filter for gases and class 3 for particles it can be used to protect against harmful substances solvents toxic particles and micro-organisms. The special Portwest bayonet system ensures a safer connection between the mask and the filter while the twin filters offer improved comfort and balance. This filter is compatible with the P500 Full Face masks and the P420 P430 Half Masks.