I use Widder's System 2 (with collar) vest and am very happy with it. Mine just has an on/of switch and I've never felt a need to adjust temperature. My only problem is that the cable is not long enough too stand up on the footpegs and remain connected. Too often I forget that. Of course, if the cable was any longer it would present other more serious problems (like the ability to get itself caught in the chain, etc...).
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Improvement makes strait roads, but the crooked roads without Improvement, are roads of Genius - William Blake
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Improvement makes strait roads, but the crooked roads without Improvement, are roads of Genius - William Blake
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