Shoulder Length Winter Liner offers Thinsulate® inner panels and red heavyweight fleece lining. This winter liner ranks among the warmest and most comfortable available. Full head and neck coverage with extra-wide wrapped collar to keep out wind and cold. The shoulder-length winter liner can be tucked into jacket. A 100% cotton, 7 - 8 oz. blue twill exterior with black fastener for long wear. Thinsulate® is a registered trademark of 3M