French Fitness Revolution Helmet Liner Sweat Wicking Skull Cap Beanie. Ultimate Performance Moisture Wicking. Fits Under Helmets

Exactly as described, stretches' to fit most heads, well I take large and it fits well, I intend on wearing it under a cycle helmet, especially during the summer, it does not need to be warm but something that dries quickly and to stop small annoying insects crawling inside my cycle helmet.

This skullcap gives an excellent close fit without feeling tight. I never wear skullcaps over the ears, but the “unused” material in this one doesn’t get in the way. I was really unaware that I was wearing it apart from the fact that my head didn’t feel either too cold or too warm (on a fairly chilly and windy ride). Unlike other skullcaps I own, it doesn’t leave marks in my forehead caused by the helmet pressing seams into the skin. I’ve ordered a couple more because I’m impressed.

Nice fit, light and keep my head warm!

Great to use all round the year including summer.Top quality, I was impressed and purchased 2 more of the same colour.

I have quite a large head and was hoping this would be a good fit as some reviews indicated. However, it is still quite a tight fit for me.

Great colour's fits nice

I’ve bought this wear under my swim hat when we go cold water swimming. Good fit. So far it hasn’t disappointed and it’s thermal properties will keep me nice and warm during the height of winter, breathable and quick drying. Recommended

The hat is very tight, seems like a child size. Had to return it.

Fits nice and tight and works well under my motorcycle helmet. Would buy again

My husband loves it . The material is nice and well made and looks durable . Most important the items arrived clean . If this company makes a complete suite for cyclist , please notify me and I will buy it and I will recommend it to our cyclist friends .

Fit perfectly. Good for sport. I used it while riding unicycle. I used it too everyday like while i'm working.

Amazing quality

Got these for a somewhat weird reason - the pads on my motorcycle helmet rub my hair each time I put it on, and it was causing damage and breakage to my hair. So, I picked these up in order to help protect my hair and reduce the damage. Turns out, it works pretty well! I wear a full face helmet and this fits under that helmet just fine, though it does make my helmet a bit more snug than it used to be (as expected, honestly). No issues putting the helmet on over it. The cap does usually come off with the helmet each time, but I consider that to be as expected. It's currently the cold season, so I definitely have not tested this thing with heat/sweat conditions, but if you've got all the vents on your helmet closed, it does work as a pretty good additional insulator for warmth! Open the vents up and the air flow will, of course, keep everything plenty cool. I imagine it will be fine in the summer due to the simple fact that moisture being pulled away from the fabric will induce a cooling effect.I have a pretty small head (extra-small motorcycle helmet), and this fits just fine compression wise, but can come a bit low on my forehead/over my eyes if I don't take a moment to pull down the extra in back. Pretty much the usual when you have a head like mine. Lol.