I work for a MLB team. I tried it out at our fan fest in Jan. It was cold out. The vest kept me warm for 4 hours. I need to get a battery so it will go my whole shift
My husband is a hunter and when you hunt in ND at this time of the year, your feet get cold when you are out for extended periods of time. He has enjoyed the warmth of these inserts and will be happy to have them when he is our snow-blowing too!
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