I usually wear a Tilley or generic boonie hat while out exercising or working in the sun. Unfortunately they get sweated through and they are not all that comfortable after a while. I was thinking about getting one of those plastic "pith" helmets (I have no desire for an actual pith helmet) you see letter carriers wearing? I have been told they allow for good sun shielding and air ventilation and can be easily dried with a tissue. I'm curious is anyone here has any experience with such toppers? I suspect they are made by different contractors and I would also like to find out which maker to purchase. Thanks.