This is exactly what I do. I use https://www.amazon.com/gp/product/B07SC1MWYL/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1 https://www.amazon.com/gp/product/

This is exactly what I do. I use https://www.amazon.com/gp/product/B07SC1MWYL/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1 https://www.amazon.com/gp/product/B07SC1MWYL/ref=ppx_yo_dt_b... which is the least amount of mask I could find to wear over the N95. I do seal the valve on my N95 masks with a sticker. The ones I have breath quite well with the valve sealed and I don't wear them for long enough for it to matter. I also use the less effective mask for situations that are mask required, but not actually necessary such as Autocross. I use Cambridge masks. They will still order and deliver in a reasonable (if long) amount of time. Claim to be lab tested N95, and have above average fit for my face.