TSLA Men and Women Thermal Fleece Skull Cap, Winter Ski Cycling Under Helmet Liner, Running Beanie Hat, Cap 1piece White, One Size

Great for close fitting hat, even if you don't wear it under a helmet, etc. Warm and covers the ears well with just enough stretch. I am bald and it stays on all night while sleeping, as well. Quality product. No complaints.

I use this for outdoor running in the Salt Lake Valley area of Utah. I prefer my bennies and skull caps to hold in the heat I produce and not necessarily be super warm on their own so for me it's perfect. It is a bit on the snug side for me but it has a sufficient amount of give so it's not uncomfortable at all. An added bonus to that is it holds my ear buds in place.

Overall this hat is surprisingly warm. I used this when the temps dipped below 0 F and never had any concern keeping warm. It’s very comfortable. I’m not sure how good the fit will be for everyone. I have a quite small head and found the size small fit pretty well. That said, it tends to settle just enough that the bottoms of my ears end up uncovered every few minutes. A slight change in the depth of the hat or a change in the contour around the ear may remedy this issue. This issue aside, I really like this hat. It’s nit bulky, which makes it easy to stash in a jacket pocket. For the price I paid, I’m very pleased, and would gladly buy another.

I know if depends on head-size, but I found the M perfectly tight but in no way constricting - keeps my headphones in, my ears covered, but leaves no mark on my forehead nor gives me a headache. And toasty!

Very comfortable, kept head warm in 35 deg run,

This hat in White is way too tight and does not stretch! It will give you a headache! I have five TSLA products and I do generally like them, however this hat is a major problem. I have it in White and Charcoal; the Charcoal hat is great; it stretches and fits well. The White version is another story, it doesn't stretch and is very tight. Something must have gone wrong in manufacturing, TSLA needs to check quality control. If you do order it in White - Good Luck.PS. My head size is about 7.5 inches (large).

I've been very happy with Tesla products and needed another winter running hat to alternate with my other beanie, so, I am not using this as a helmet liner.Pros: Inexpensive, warm (use it mainly for temps between 20-40F), and does a good job of wicking the moisture away from my head.Cons: A little short depending on the size of your head, but doesn't quite cover all of my ear; and when drying mine after a run, I hung on a plastic clip hanger and it looks like it mildewed under where the clip was... wouldn't have been noticeable but for it being a white hat.

Everything what I’m looking for stylish for casual wear and sport. Fits excellent and stands out from the rest I toyed not heavy on the head and when inside easily fits in a pocket for safe keep. I really recommend this idem .