GF22 Gas Filters have exceptionally low breathing resistance to provide comfortable and long duration use.
The standard 40mm thread makes them suitable for use across the entire Full Face Mask range, and those weighing 300g or less can be used on the Profile40 Half Mask.
The range includes A2, B2, E2, K2, A2B2, B2K2, ABEK2 and AX types.