P902 is an A type class 2 gas filter and protects against organic gases and vapours where the boiling point is higher than 65°C. It can also be used to protect against hydrocarbons and solvents. 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.