Has anyone worn a cooling vest for personal or work use? I am considering buying one to try and cope a bit better with the heat here in So. California. I am house-bound during the summer much more than I would like to be. I hate having to tell my kids that I can't go play or go on a walk with the family simply because it is too hot outside for me. I have done a little research and think that I like the Phase Change Technology, but I would love to hear from someone who has used a cooling vest. I know it's probably a long shot asking on this forum, but I figured with thousands of members, you never know.