By the time the CDC told all Americans to start wearing face coverings to slow the spread of coronavirus in early April, protective masks were already hard to find. The medical-grade masks that are available should be reserved for healthcare workers, which leaves everyone else with limited options for following the updated safety guidelines. Luckily, making your own mask at home is fast, ethical, and cheap—and you don't even need to break out the sewing machine to do it.

This video, posted on Julie Eigenmann's Instagram, illustrates how to make a no-sew face mask using supplies you likely already have at home. Start by folding a square scarf or bandana four times lengthwise to create a strip that's big enough to cover the bottom half of your face. Next, pull each end of the cloth through an elastic hair tie or rubber band (one on the right end and one of the left) so that it's roughly divided into thirds. Fold the ends into the center and tuck one end into the opening of the other to hold it all together. Pull the hair ties over your ears to secure the mask to your face.

To boost your mask's filtration power, place a trimmed coffee filter or paper towel on the cloth where your mouth will go before folding it.

After wearing the mask outdoors, you'll need to disinfect it. Take it apart, throw away the disposable filter, and soak the fabric in soapy water for a few minutes. When the cloth is clean and dry, add a new filter and reassemble the mask as shown above to use it again.

DIY cloth masks are better than nothing when it comes to protecting your face from someone coughing or sneezing nearby. But no mask will make you invincible to COVID-19, and you shouldn't use one as an excuse to act any differently outdoors. Use them on necessary trips outside, like to the grocery store or your essential job, and continue keeping a safe distance from others.