Norfolk Liner Vest is our version of the classic light liner vest. This style has come to be a stable piece in the modern wardrobe - easy to wear, easy to pack and easy to style. Cut in a 100% nylon fabric with Primaloft padding. Primaloft is a brand of patented synthetic microfiber thermal insulation material that was developed for the United States Army in the 1980s. Famous for its warming, light - downlike properties. We chose it because it is animal friendly and, in our eyes, better than real down.