Undersuit ThermAlution Yellow grade advanced heated undervest
Appeared in DIVER April 2012
I used the Thermalution undervest for a leisurely swim round Wraysbury Lake last January. I wore it over a Merino wool base layer and under a Bare Mid Layer undersuit.
The vest heated up within a few minutes, and at times I felt really hot. More to the point, I never felt really cold.
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