Rothco ECWCS Poly BottomsNeed to stay warm this winter? Whether you're in Minnesota or in Nova Scotia these GI style extreme cold weather bottoms will definitely keep you warm. Rothco's Polyester Extended Cold Weather Clothing System ECWCS, features a 100% polyester with a soft and comfortable fleece lining. For added comfort the underwear features a full cut. Be sure to view the matching tops as well. Sand is not available in 3X, but is available in Black and Brown