Editor’s note: This article was written by Alex Hollings. It was originally published on Sandboxx.com. Make sure to follow them on Facebook.

Secretary of Defense Mark Esper recently issued orders for service members to wear cloth masks in places and situations when social distancing isn’t feasible, as a part of a force-wide effort to curb the spread of the coronavirus. Effective immediately, service members and their dependents on post are required to wear cloth face coverings in public places on post, prompting some to wonder where exactly they’re supposed to get masks from.

Much like the recently released Center for Disease Control (CDC) guidelines on making simple cloth masks, the Marine Corps has issued its own cheap and easy way to make a cloth face covering out of your standard-issue green skivvy shirt. Of course, this would work with other shirts as well, but using a skivvy shirt ensures the cost to the service member is low, as well as ensuring the color of the mask is appropriate for wear in uniform.

“Effective immediately, to the extent practical, all individuals on DoD property, installations, and facilities will wear cloth face coverings when they cannot maintain six feet of social distance in public areas or work centers (this does not include in a Service member’s or Service family member’s personal residence on a military installation). This includes all: Military Personnel; DoD Civilian Employees; Family Members; DoD Contractors; All other individuals on DoD property, installations, and facilities,” read a force-wide memo from Defense Secretary Mark Esper.