Design of CapsI had one before, that I bought from REI, but they don't carry it anymore.
It should be made from quick drying nylon, it should be a very light color (sand, white, yellow), It should have a cool feeling soft terry (coolmax?) sweat band, and it should have a bill large enough to protect your eyes from a setting sun. It should also have a snap on "cape" to prevent "redneck" syndrome when working in hot fields.
Thin Light Cool Cap