3M™ Reusable Respirator Filter Retainers enable users to add particulate protection to existing 3M™ Gas & Vapour filters for use in a wider range of applications. For use with 3M™ Particulate Filters 5000 Series, 3M™ Reusable Respirator Filter Retainers enable users to easily combine their protection for use with a wide range of gas, vapour and particulate hazards, or a combination of these.