While they might be convenient, disposable paper face masks normally contain microplastics. A recent study in the UK found that if all the residents there wore one disposable mask every day for a year it would contribute around 66,000 tons of plastic waste. If you aren't in an environment where N-95 or a surgical masks are required, please consider a natural fiber cloth mask.
For more information about reducing plastic use, check out PlasticFreeJuly.org