In July, when the U.S. hit peak heat and humidity levels, Cotton Incorporated, the national trade association for cotton importers and producers, launched a campaign called #CoolerInCotton with a video about how the textile can alleviate sweaty summer woes. A young woman prances around on an old-fashioned Hollywood-style set singing: “It’s 95 degrees and in your pants it ain’t pretty” and “We should be able to go for dinner without sweating through that gown.” The…