I just use some cheap Coolmax caps from Amazon. I have a few of the more expensive name brands, they pretty much function the same. I don't want over the ear, so all I need it to do is keep the sun off my bald head. Nothing works great for sweat control, a sweat band is as good as a skull cap. If I know it's going to be a hot day, I bring a spare and swap out when the sweat is getting into my eyes.