If you wear a L size hat and wear a one size hat, for example, the Outdoor Research Swift cap has a low hat height, so it looks like the hat is slightly raised, so I was reluctant to buy it. It is a bit high and seems to fit well with people who wear L size hats in general. Crushin It Cap has a mesh structure on the left and right sides for good ventilation. It wraps around the inside of the hat, including the forehead, and is padded with a material that absorbs sweat. Great as a summer hat. As a summer hat in the middle of the Sunday Afternoon cap Crushin It Cap is recommended for breathability For moderate breathability and sweat absorption, Vaporlite caps are recommended. (Both types of hats are one size.)