Skyscrape fabrics literally change shape when temperatures change, becoming thicker and insulating more when temperatures are colder so users can be comfortable wherever they are. As temperature changes, the active yarns in the fabric expand and contract, causing it to bend, increasing or decreasing the thickness of the fabric and its insulative properties. The fabric itself acts as a thermometer, with the thickness and insulation increasing in the cold.
This shape-shifting jacket automatically gets warmer as the temperature drops
February 21, 2020