About Polar Fleece

Uses
Polar fleece is used in jackets, hats, sweaters, sweatpants, cloth diapers (nappies), activewear, hoodies, sleepwear, blankets, and high-performance outdoor apparel. The fleece produced can be used to make very light, soft, and easy-to-wash clothing. Polar fleece stretches more easily in one direction than in other directions
History
Polar fleece originated in Massachusetts in 1979 when Malden Mills and Patagonia developed Synchilla (synthetic chinchilla). It was a new, lightweight, strong fleece fabric designed to mimic and even surpass wool in some aspects. Malden Mills CEO Aaron Feuerstein deliberately refused to patent polar fleece, allowing the material to be produced cheaply and widely by many suppliers, leading to rapid widespread acceptance of the material.
Features
Polar fleece is a lightweight, warm, soft fabric that has some of the good qualities of wool. Polar fleece garments are traditionally available in micro, 100, 200, and 300 models, where the number represents the weight of the fleece in grams per square meter (gsm). Heavier wools are warmer.
Wool can range from high-loft to tightly woven. High-loft wool is warmer because it contains tiny air pockets that retain body heat. [8] Traditionally, fleeces always had a double-sided pile (i.e., they were fluffy on both sides), but nowadays, garments are often advertised as fleece even if they do not have a double-sided pile. [9] [10] High-loft wool (which has a higher loft) will eventually lose some of its loft over time by becoming tangled. High-loft wool also accumulates dirt more easily than low-loft wool.