I live in Texas and have a 20 degree incubator (which incidentally I think I've never used in Texas) and a 40 degree phoenix. In the fall/winter of Texas I've needed the Phoenix and try to bring it just in case when it's warmer. It weighs so little IMO it's better to have and hang loose if not needed than to be cold. With 40 degree phoenix econs going for $89.95 you have no excuse.
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