Theoretically, an N95 respirator should work well.

In practice, the benefit of wearing masks to mitigate respiratory illness is not detectable at meaningful levels in randomized clinical trials. Prepandemic, this was studied widely for flu. During the pandemic there were unfortunately very few robust studies.

This article gives a good overview: https://www.theatlantic.com/science/archive/2021/12/mask-guidelines-cdc-walensky/621035/