The cooling vest is a very good idea. As I mentioned in an earlier post I wear one myself. The one I have has a mandarin collar which helps a lot. I wet mine at every stop. I also strongly recommend a neck wrap. I use an Endura cool most of the time but I also have a HyperKewl with the beads. Having something around your neck makes a tremendous difference because it cools the blood going to your head because the Carotid artery is very close to the surface in your neck. Also if you can keep a bottle of water within reach you can pour that on your neck and shoulders to re wet your vest an neck wrap as you are riding. The camelback is also a great thing when riding. Not waiting until you stop to drink is very helpful in avoiding dehydration.
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