Personal Microclimate Body Cooling Vest Unisex

I work in Missouri, a very hot and humid state. My work in a fabrication shop running laser metal cutting machines gets very hot. Start work at 5 am before 6 am I am completely and totally drenched in sweat. Then I purchased this. What a difference. A frozen bladder doesn't last the 3 hours, more like 2. Once you turn it on it feels like jumping into a glacial river on a hot day. After the initial charge wears off I fill it with ice, it's an amazing feeling. The effects include not feeling completely drained after a 10 hour shift. I have more energy at the end of the day. My intake of fluids has decreased, normally go through a gallon and a half of Gatorade, with this half a gallon. I preform at the same level at end of day as beginning. I recommend purchasing a second bladder, and battery. I have no issues bending over with the pack as it is very snug if all straps are right. Also you want it to be smaller than you would normally get. It stretches with better effects the tighter it is. I had to go 1 size larger than really wanted because I needed the length. Should have compromised on the length for the tighter fit. Very few things you can buy will change your life, this one has changed my life . Would highly recommend this to anyone who works in hot environments.