To the Editor In response to the article, “Association of Surgical Jacket and Bouffant Use With Surgical Site Infection Risk,”1 published online in JAMA Surgery on February 12, 2020, the Association of periOperative Registered Nurses (AORN) thanks the researchers for contributing to a new and growing body of research regarding hair and arm covering in the perioperative setting. There have been several changes to the 2019 Guideline for Surgical Attire, including recommendations regarding hair and arm covering, laundering practices, personal items, shoes, and cover apparel.