Not to warm where it makes you sweat, but keeps your ears warm. It says women's but as a ski racer I have always used crochet headbands. I have now started using while bouldering at the gym, keeps sweat out of my eyes, my ears warm and my head can still breath. The shell button at the back helps so much for making a perfect fit. It is made extremely well and is wicked comfy. To anyone anting a good head band look at this one.