Cotton Twill Shell and Fleece Lining with Thinsulate(R) Winter Lining – Featuring three layers, this winter liner is constructed of a warming navy blue cotton twill shell, a 3M Thinsulate(R) thermal fleece midlayer, and a heavyweight red polyester liner. The outer shell and binding are flame retardant when washed, and the polyester fleece lining and fasteners are flame resistant. This winter liner is must-have length for added protection from the cold.