U.S. Military Surplus Fortiflame Layer I fabric. The latest evolution by legendary United Joint Forces provides maximum comfort in mild-weather conditions. The lightweight 4.4 oz. fabric blend has natural stretch and a soft fabric face for the ultimate next-to-skin comfort. The Fortiflame fabric is inherently flame resistant and has inch0 inch after-flame or melt/drip during test method ASTM D6413-11. Unique moisture-wicking technology lifts sweat to the surface for quick-drying evaporation. Treated with an antimicrobial to resist odors. The official version used as part of the U.S. military mild-weather uniform. Made to strict military specs for years of dependable use. Lightweight Layer I Base Layer is ideal for mild weather conditions Flame-resistant Fortiflame protection is ASTM D6413-11 and HRC1-certified 4.4-oz. modacrylic/rayon/nylon jersey-knit blend Wicks away moisture and dries quickly Antimicrobial protection resists odors Flatseam construction eliminates chafing from gear Made in the U.S.A.; Berry compliant Order today!