I have and use headsweats covers. I cannot remember what they are actually called. They have the sweatband underneath but allows for heat and water to escape when riding. I purchased three in blue, red and white. I use the white one around here during the summer since it gets so hot. I do not mind that they are all solids because they are under the helmet so they are not really visiable.
The other option could be the Buff which comes in many colors and now sizes.
Hope this helps.
Red Rock