Libertarians believe in the non-aggression principle. Don't hurt other people. But you may have coronavirus (some people have no symptoms) and be infecting others. That's why masks are important- so you don't hurt other people. Just in case.

I gotta plug my masks. I promise you, though, that I was promoting wearing masks on here before I was selling them. It's also not hard to make your own or just wear a scarf. But if you want liberty-themed masks, I got you covered. https://libertyjunkies.com/collections/masks