A typical a face mask is made of polyester that one often finds in regular beanies. It's stretchy and not quite as soft as cotton. The Cool Max Polyester Face Mask is also, as its name indicates, made of 100% polyester; however, it is made of the trademarked COOLMAX performance polyester fabric. More information is available at www.
coolmaxfabric.com. The fabric is better at absorbing moisture from your body, and it also feels like cotton instead of traditional polyester. This will serve you very well in your chilly outdoor endeavors.