I use these and they are amazing. Also they help make up for worn padding in my helmet too. Get the thin 1" version.
https://www.amazon.com/Halo-Headband...qid=1565198803
I got two, because I can't cycle without it in the summer. I'll soak the pads in my helmet, but these drain the sweat to the back of my head.
Tried the cycling caps but they are too hot and they don't fit my head well. I need the ventilation.