FR Featherlight Work Shirt Ariat flame-resistant Featherlight Work Shirts offer the ultimate in lightweight protection. Made from premium 100% inherent FR fibers with Moisture Movement Technology℠to keep you cool and dry, the Featherlight is built to fight the heat. CAT 2 ATPV 9.5 cal/cm2 NFPA 70E NFPA 2112 Greater Arm Mobility seam construction for maximum range of motion Moisture Movement Technology℠keeps you drier Crafted with fabric made in the USA Ultralight 5.3 oz inherent GlenGuard fabric Button down with double front chest pockets Left pocket pen slot Shoulder mounted gas detector loop Permanent colorfastness 74% meta-aramid, 20% modacrylic, 5% para-aramid, 1% antistatic.