This Girl Runs Sports Visors are perfect for Spring & Summer running. They provide shade on sunny days without making you feel hot, like wearing a baseball cap would. Our members who wear glasses are particularly fond of these visors as they provide glasses shelter during rainy runs. And of course these visors make identifying fellow This Girl Runs members easy to spot, particularly at Park Runs and local races. Its the perfect way to ensure you get some cheers from the TGR tribe.These visors are one size fits all. The back is an adjustable strap to fit all head sizes.