What kind of fabric is polar fleece?
The principle of polar fleece is to use polyester to rub and fluff, bend and twist due to static electricity, and form small balls. The polyester fiber itself has high strength and the fiber is not easy to break, so the formed small balls will not fall off on the surface of the fabric. The ball forms the unique style of polar fleece. Because many fibers are entangled with each other, it locks a lot of air in the middle and slows down the convection with the outside air. It is an ideal warm fabric