This caught my eye in the apparel arena. In this article for Outside magazine, HH claims to have gotten the idea by observing fishermen cut holes in their synthetic layers to keep from overheating and not marketing ploys (link accessed Mar 2014):
Not that I'm about to take a hot knife to my Patagonia Regulator fleece anytime soon but maybe a cheaper MEC fleece or a worn fleece/heavy base layer developing holes anyways… Thinking about this in a DIY/UL sorta way, most of the time a fleece (if worn on the move) is typically under a shell. Problem comes from stopping too long for breaks but just don't stop too long for breaks.
