(FILES) The wool master Jacques Arpin prepares wool to be packaged in cans of wool yarn, in the Arpin wool spinning factory in Seez, on November 9, 2017. Can technical sportswear do away with petroleum-based materials? Designers are hoping so, as they create swimming costumes from wool and trainers from whey and fruit - a challenge for sports brands faced with the imperatives of strength and safety. (Photo by JEFF PACHOUD / AFP) (Photo by JEFF PACHOUD/AFP via Getty Images)