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. 

Product Details: 

An Essential Base Layer Component Designed To Protect You From The Elements
100% Polyester With A Soft And Comfortable Fleece Lining Designed To Keep You Warm
Matching Tops Available Both Crew Neck (Item #5725) And Zip Collar (Item #5425)
Part Of The Military ECWCS (Extended Cold Weather Clothing System) Underwear
Full Cut Provides Added Comfort And Fit