The AR 670-1 Coyote Brown Extreme Cold Weather Polypro Crew Neck Shirts are military approved and feature 100% Expedition Weight Polyester with a soft and comfortable fleece lining thats moisture wicking under garment. These polypro shirts are excellent for military, work, outdoors, skiers, snow boarders, hunters, ice fisherman and anyone who has to deal and put up with extreme cold climates. This garment makes an ideal base layer that will be comfortable and feel good on in the great outdoors. Sizes: S-M-L-XL-2X-3X