In the cooler months I normally wear a skullcap like this, which both keeps me warm and covers my scalp under my helmet.
Now that summer is around the corner that skullcap is way too hot. I'd like a way to protect my scalp without completely overheating... do any of my fellow bald guys have any tips?
Edit: To clarify, yes, I am wearing a helmet. Any solution would have to be something that would work under the helmet.