Originally Posted by
elcruxio
I have a Bell Piston, a Bell Solaris and had some trek helmet that 'got lost' on this tour as I just didn't use it.
The thing about hats vs helmets in hot weather is that you can dunk your head in water, then dunk the hat in water and when both get dry, repeat. Much nicer than ventilation that's still goin to be inferior to having no hat at all or a wet hat.
Only works if humidity is pretty low. In my area, you'll just get even more sweaty and disgusting if you try that route. There's also nothing stopping you from doing something similar with a helmet.