It actually got cold enough here in the desert to have a fair test of the warmth retention capabilities of a full 16-oz "tank" - the low yesterday morning at my house was 25ºF (-3.89C) - that's the first time in over 16 years that it has officially "frozen" here in Phoenix. And even this "thin-blooded" Desert Rat was warm & toasty! (Geez, sounds like I'm a Quiznos sandwich!)

Those Scots came up with a great garment!!!
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