“I have worn underarmour Iso-Chill ArmourVent caps, for yrs, maybe from their first release, these US caps as VERY similar in the fact that the peak internals seem to be similar to UnderArmour, they are both plastic with an air gap that you can feel between the hat and the peak, allowing airflow and taking away some of that pressure you can sometimes feel with other peaked hats. these are very good quality and best fitted feel you can get, so best buy one if they have in your size, they certainly won't last long in the larger sizes”
