What type of mask does DHEC recommend?
To protect yourself and others from COVID-19, DHEC continues to strongly encourage everyone ages two and older to wear a well-fitting mask consistently and correctly when around others. Choose a mask that has two or more layers, completely covers your nose and mouth, and fits snugly against the sides of your face and doesn’t have gaps.

A proper fitting KN95 mask is ideal in non-healthcare settings, but not everyone has this type of mask. The key thing to remember, is to consistently wear a well-fitting mask to prevent the spread of COVID or its variants.
The CDC has additional mask guidance here.
How to Protect Yourself & Others