Stretch
From the picture, it’s difficult to tell what fabric that is made of. It feels like a thick Lycra that has a smooth face and plenty of stretch. I have a very small head (50 cm) and the hat fits tight on me. I’m sure it stretches out for larger heads, but if your head’s circumference is above average, I suspect that it would feel too tight and that you might be best with another model. If fits great under a bike helmet, and breaths well.
