True or False? Hats or Caps Can be Worn Under Helmets

It’s cold, it’s raining, or it’s hot…so should you wear a hat or visor with your bicycle helmet?  Short answer – Maybe not. Long answer: “The Bicycle Helmet Safety Institute, a non-profit organization for bicycle helmet safety information, warns that hats and visors compromise the helmet’s fit and safety. Helmets are meant to fit snugly against your skull without anything between your head and the helmet’s inner harness.” Your helmet should be level and cover your forehead. Use of a hat or visor under a helmet can push it higher on your head, exposing your brain in a fall.

What to do? For sun? Use a visored helmet; the attached visors don’t affect fit. For cold? Buy a winter helmet with ear coverage and fewer vents, or use a helmet cover, coupled with ear coverage, e.g., ear covers (, or earbags ( Thin, non-slipping skull caps can work but recheck your helmet fit before mounting your bike!