Does it work well? This will be our first time traveling in August and I am trying to come up with ways to stay cool. I bought two Champion brand tanktops with Coolmax at Target last week on clearance. Are these a good product? What should I be searching for? Thanks for your help and any other tips you can give me to keep (and DH) cool on our trip! PS-We live in central NC so we are pretty used to the heat and humidity!