I use one of those quilted type vests when doing very hot long distance summer riding. You soak it in water and then get a nice evap cooling effect for a while. That type of riding is not fun because once it gets past 9 am or so you constantly are getting hit with big gusty thermals.
Sounds interesting. But at 72 and with my wife’s physical problems we can’t do those week long cross country motorcycle tours any more. Oh well.