French Fitness Revolution Skull Cap Helmet Liner Running Beanie - Ultimate Thermal Retention and Performance Moisture Wicking. Fits Under Helmets

I love these caps and they fit just right , neither tight nor loose. They are made of good material and I use them everytime I go out to run in cold winters, they keep my ears and head warm and look good too.

I wear this under my push bike helmet and my motorcycle helmet. It's a very generous fit so when I'm on my pushbike i pull it right over my ears to keep the wind out.I originally wanted this for under my motorbike helmet in the summer months because i have a completely bald head. If my head gets hot and clammy not only is it difficult to pull the helmet down but also i don't want to make my helmet sweaty. I like the fact it doesn't leave an imprint because the seem is well away from my forehead. Please note I have an XXL head.

Good material, light but keeps the heat in, but doesn't make it uncomfortable to run in..Used as a hat, not under a helmet, so don't know how it would be, but it's light enough and comfortable enough to do so, I can imagine..

It is superwarm and light, an excellent product

Very tight. Cant wear for too long. Shame

Good

If you want a warm winter hat, this is not for you. If you’ve want a thin hat for running, just to take the chill off a bald head and to make a head torch more comfortable, then this is great. Seems like it will wash well and hopefully will last.

As described comfy and deliver in performance