Disposable PPE suits can cost less than $20 online, but health experts aren’t advocating wearing them on planes during the pandemic.

“Wearing a hazmat suit on an airplane is unnecessary and could cause undue concern for other travelers,” Scott Pauley, a press officer for the Centers for Disease Control and Prevention (CDC) told The Washington Post by email. “CDC recommends wearing cloth face coverings in public settings where other social distancing measures are difficult to maintain.”

Nonetheless, multiple carriers are requiring flight attendants to wear hazmat suits on planes, including Philippine Airlines, AirAsia and, most recently, Qatar Airways, CNN reported.

On May 18, Qatar Airways announced it would require members of its cabin crew to wear disposable Personal Protective Equipment (PPE) suits over their uniforms in addition to other gear including safety goggles, gloves and a mask.