I bought 3M respirators and filters several months ago. I did not use it since I worked from home and did not go shopping. Those devices are more cheaper than N95 mask.
https://www.3m.com/3M/en_US/company-us/all-3m-products/~/All-3M-Products/Safety/Personal-Safety/Personal-Protective-Equipment/Reusable-Respirators/?N=5002385+8709322+8711017+8711405+8720539+8720550+3294857497&rt=r3
I bought 3M respirators and filters several months ago. I did not use it since I worked from home and did not go shopping. Those devices are more cheaper than N95 mask.
https://www.3m.com/3M/en_US/company-us/all-3m-products/~/All-3M-Products/Safety/Personal-Safety/Personal-Protective-Equipment/Reusable-Respirators/?N=5002385+8709322+8711017+8711405+8720539+8720550+3294857497&rt=r3