P952 is A2P3 type combination 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, P421, P431 Half Masks.