Introducing the DF4-505TS-CB, an ultra-lightweight 4.5 oz. knit base layer that combines comfort, safety, and performance. Made from soft FR fabric with dropped, flatlock seams, it reduces chafing and dries three times faster than cotton, ensuring maximum comfort in any environment. Certified by the USMC (MODFRN-OD21-001105-13709), this garment offers inherent flame resistance, moisture management, and odor control. Berry Compliant and made in the USA, it meets FR compliance per ASTM 1506 and is Safe to Fly, making it the ideal choice for demanding situations.