Main body fabric - polar fleece. Nylon shoulder, neck and elbow patches. Extra warm - can be worn as jacket or jacket liner. Full front zipper with gridded fleece inner flap. Zips all the way up through collar. Gridded fleece side/armpit panels for breath-ability. 2 outer side pockets. 2 inside mesh pockets. Hook and loop for rank and name badges. ECWCS - Extended/Extreme Cold Weather Clothing System. GEN 3. GEN III. Ideal for cold weather. GI - Government Issued style. Army style. Military style.

The 3rd generation (3G or Gen III) ECWCS is a radical redesign of the clothing system. It features seven new layers of insulation including 3 polartec fabrics, 2 layers of polartec power dry and a layer of polartec thermal pro high loft. There are many variations to ECWCS types but most abide to the basic rule of better protection in extreme cold weather.