In recent years, myths have circulated around the Internet indicating that wearing underwire bras can cause breast cancer. In this short video with Sonima founder Sonia Jones, you’ll get a definitive answer about whether or not there is any truth to this notion. The theory poses that the tightness of a bra impedes lymphatic flow and blood circulation, and thereby can lead to health problems. To learn more about breast health and The Dubin Breast Center in New York City, where this video was shot, click here.

Related: The Surprising Factors That Increase Breast Cancer Risk