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As an alternative, consider buying heated vests. They are self contained and some have variable temp settings. [ame]https://www.amazon.com/gp/aw/d/B00UR4DEVG/ref=mp_s_a_1_2?ie=UTF8&qid=1476281336&sr=8-2&pi=SY200_QL40&keywords=heated+vest&dpPl=1&dpID=4 16b8dtKi5L&ref=plSrch[/ame]
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Jim
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