Rothco’s Gen III Level 3 Extreme Cold Weather Clothing System, or ECWCS, Jacket is a versatile piece of military outerwear that can be worn as a jacket or liner. The fleece jacket/liner features a 100% polar fleece body that keeps you extra warm with a full front zipper that zips all the way up through the collar. Neck, shoulder & elbow patches are all made from 100% durable nylon. The ECWCS jacket also features gridded side/armpit panels for breathability, loop fields for rank and name badges, 2 outer side pockets, and 2 inside mesh pockets.