This complete takes care of the problem of sweat dripping into my eyes in spin class. I have to wear it as low as possible on my brow (above my eyes), but it does the job. The little plastic strip inside the band keeps the sweat from draining out of the band above my eyes.

I have a medium-sized head I guess (about 22.5-inches around), and it doesn't slip down even when I'm running. It also doesn't feel too tight.