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The only problems with these vests is that they are expensive $180 plus. In addition to this you will need two or three sets of packs to get you through
day costing around $100 plus per set. Phasechange vests available at http://www.coolsport.net
3. Personal Ice Cooling System (PICS) are most effective by far. They are also most expensive about $1800. They work by pumping iced water around a vest using a small pump. The pump is powered with rechargeable batteries. The water is cooled by ice packs. One of advantages is that it uses regular ice in packs and as long as you can find a freezer or ice your in business.
These vests will keep you cool in any conditions. They are even used by military. They are suited mainly for working enviroments in heat. They require a type of back pack of tobe worn. This system weighs of approx 8lb. They are very effective though at keeping you cool in heat. (PICS) available at http://www.technicalproductsinc.us/cool_system.html
4. Cooling bandanas and neck ties use highly absorptive polymers that are sewn inside neckties and bandanas. When soaked in water they absorb water and swell up. They are then worn and help a little to keep you cool. They use evaporative cooling. They can also be placed in refrigerator before use for added cooling. These products available at http://www.imcoolnow.com
5. Lastly guys as simple as it may seem try to have plenty of cold water handy. If you drink water before you start to become dehydrated you feel much better.
Brian Fogarty has a website that discusses cooling products and shows you how to make your own. To find out more visit http://www.keepingmecool.com
