When you buy through our links, Business Insider may earn an affiliate commission. Learn moreSamantha Crozier/Business Insider, Sally Kaplan/Business InsiderFall in New York City means shivering at an outdoor dinner immediately followed by a journey into the steamy underground subway that makes you sweat through your layers. And if you're wearing a wool sweater, the sensation of fibers itching at your skin under a puffer coat while you wait for the L train (and even worse — on the train when you're pressed up against grumpy commuters) is the worst kind of stifling.Even high-quality wool like cashmere will start to prickle if you sweat.