DRIFIRE High Performance CAT1 Flame Resistant Industrial Lightweight 5.4 oz. Long Sleeve Shirt Baselayers Made in USA NO-MELT, NO-DRIP FLAME RESISTANCE: CAT1 with inherent flame resistance fibers. DRIFIRE garments will not melt when exposed to flames or cause injuries that are far more severe than burns DRIFIRE TECHNOLOGY: Wont wash out, wear out or lose the ability to self-extinguish flames, wick moisture, and neutralize odors over time. DRIFIRE is your first line of defense in an event of a fire hazard SUPERIOR COMFORT: Lightweight 5.4 oz. fabric with a natural, soft feel and excellent durability. The soft FR fabric can help reduce chafing and maximize comfort. Composition: 75% modacrylic / 15% lyocell / 10% nylon. PATENTED dri-release TECHNOLOGY: DRIFIRE garments will reduce the risk of heat stress by wicking away moisture from the skin and releasing it into the air. The garments dry up to 3X faster than cotton to help keep you cool when it's warm and to better regulate skin temperature MADE IN THE USA: Certification - ASTM F1506; NFPA 70E compliant; CAT1; Ebt 4.5 cal/cm2 Dearborn Supply is an authorized seller of DRIFIRE product on Amazon. Only authentic DRIFIRE products provide the benefits conveyed by the manufacturer DRIFIRE wicking garments will not melt or drip when exposed to flame, meaning it will not fuse to your skin or cause injuries that are far more severe than burns. DRIFIRE garments will not ignite or continue to burn once the source of flame is removed, a problem that can lead to increasingly serious burns with other types of garments. The flame resistant fiber used in DRIFIRE garments is self-extinguishing, ensuring that your exposure to flame or fire is minimized once youre out of the danger zone. The wicking technology allows garments to dry four times faster than cotton and help regulate skin temperature. DRIFIRE technology also provides odor protection so your garments wont smell, even after multiple wears.