NikePro Hypercool Vapor Skull Cap 4.0 (Osfm,White/Wolf Grey/Blk)

I primarily wear these under my hard hat at work and they are phenomenal. They fit super tight but not uncomfortably. They’re great for sweat as they’ll keep your head and hair dryer and wick away the sweat it dries really fast. I also wear it on my motorcycle and it never comes off at any speed.

very good but to tight it looks like swiming hat

This is exactly what I wanted. The fit is perfect as I like it to go over my ears when I'm biking so as to keep the wind from whistling through my hearing aids. Very comfortable, would highly recommend. I like it even more than the Under armour one I've had for a couple of years now.

Purchased this for sun protection. I've used it a few times - overall, I like the product. It's not overly tight on the head, but it takes some adjusting to get the fit right.

I use this in summer under my bicycle helmet. It is lightweight and very breathable.