There is, of course, the old-fashioned way of staying cool. Motorcyclists and hikers have been doing it since the dawn of time, or nearly that long. Simply dousing yourself and/or gear in water and hitting the road. The idea works the same as our more technologically advanced options previously mentioned. While it won’t last as long before you dry and start warming back up, pending on your specific situation, it is an option anyone can use at little to no cost.