Warning! This product is flame-retardant, fire-retardant protection is available only where the flame-retardant fabric covers the skin and is intended to supplement - not replace - standard flame-retardant or ballistic protective equipment. Never use any Under Armour product as a substitute for ballistic protective equipment. Exposure of the skin to fire or flame can cause injury. Engineered for the field: The latest evolution in UA Tactical HeatGear performance. Durable, moisture wicking Under Armour comfort, engineered with fire retardant technology for added protection in the battlefield or on the streets. Long sleeves maximize coverage, with a loose fit and raglan sleeves for total mobility. ArmourBlock construction ensures odor-free moisture transport. 100% 4.2 oz. Nomex.