The CDC States that 

In settings where face masks are not available, HCP might use homemade masks (e.g., bandana, scarf) for care of patients with COVID-19 as a last resort.

All neck gaiters from GK are safe to wash, will not shrink, will dry quickly, have an anti-microbial coating to help fight bacteria, fungi, mold and other odor causing issues and will not wrinkle up like our competitors' products. We offer the highest quality materials with the highest quality prints period. There's just nothing like a Gaiter King gaiter.