3M Secure Click D3135 P3R Particulate Filter3M Secure Click Series Particulate Filters are lightweight filters that combine protection with comfort. Used in pairs, the filters offer low breathing resistance and good balance when connected to your mask and are designed to optimise your field of vision. They can be clicked into place quickly and easily and they can be used with a 3M Secure Click Reusable Respirator. New dual flow cartridges and filters allow for easier breathing Protects against