(FILES) A climber puts climbing shoes on before practicing on former grain silos converted into climbing walls in Bordeaux, south western France on August 7, 2024. Can technical sportswear do away with petroleum-based materials? This is the hope of designers who create swimsuits from wool and sneakers from whey and fruit, a challenge for sports brands faced with the imperatives of strength and safety. (Photo by Philippe LOPEZ / AFP) (Photo by PHILIPPE LOPEZ/AFP via Getty Images)