No, it says polyester is worst, followed by cotton, and then polyester-cotton blend being the least worrisome.I wouldn't rely on the New York Post for your science news, myself. They specialize in 'alarming' as a business model. But even the version of the study in the Post says that the biggest problem is cotton fabrics. Guess which fabric is extraordinarily unlikely to find in an Amtrak sleeping-car? Hint: it stains badly and is not at all abrasion resistant...
Between polyester, a poly-cotton blend and 100% cotton fabrics, the polyester posed the greatest risk, even after 72 hours; on full-cotton samples, the virus lasted one day, while the poly-cotton blend remained contaminated by viral droplets — designed to mimic human saliva — for just six hours.