Gorpcore — functional outdoor clothing worn for everyday rather than to stay warm and dry in the elements — turns out to have an alpinist’s endurance. It was first noticed in the wild six or seven years ago, its ascent roughly coinciding with camping-chic runway shows from Prada and others. Puffer coats, Patagonia fleeces and technical-looking shoes have been seen in New York bars ever since. 

https://www.ft.com/content/21d4ed38-eb59-4bb4-b187-0052bc58cf1d