Lifa Shirt

A newer version of Helly Hansen's invention. (Courtesy of Helly Hansen)
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The first commercially available base layer made from polypropylene, released in 1970 by Helly Hansen. It had a lining that wicked moisture away from the body, while its outer face aided evaporation. The Lifa freed outdoorsmen from wool, ushering in the “polypro” era of base layers.
 

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