I was looking for a cap for jogging in the colder seasons. After I've already returned a cap of a known sporting goods distributor for acute heat-storage at the top, I was actively looking for a hat made of 100% polyester. I highly recommend this hat for my application much. I have worn them. Even at 3 ° and 7 ° 60 minutes during jogging I had permanently warm ears and felt a very pleasant cooling effect on the head. After the races my hair was soaking wet with sweat not. If you use the cap as shown in the picture, the ears are covered in half. You can also fold down the cap, so that it reaches far below the ears.