This four-pack of combination filters is for use with compatible Portwest half and full face masks where you need protection from both gases and particles. Each filter protects against organic and inorganic acid gases and vapours, sulphur dioxide, and ammonia and its derivatives.
On the particle side, the filter protects against harmful substances, solvents, toxic particles and micro-organisms. Portwest’s bayonet system gives a safer connection between the mask and the filter.
Key features
- Combination gas and particle filter covers both hazard types with a single filter
- Protects against organic and inorganic acid gases and vapours
- Protects against sulphur dioxide, and ammonia and its derivatives
- Particle filtration protects against toxic particles and micro-organisms
- Portwest bayonet system gives a safer connection between mask and filter
- Lightweight construction
- Pack contains four filters
Standards and protection
Certified to EN 14387 Type ABEK Class 1 for gases and EN 14387 Type P Class 3R for particles. The filter is classified CE-CAT III and is UKCA marked.
Compatible masks
These filters are compatible with Portwest half masks P420, P421, P430 and P431, and with the Portwest P500 full face mask.
Care
Follow the care instructions on the label.




















