Bulwark Flame Resistant 4.5 oz Nomex IIIA Snap-Front Uniform Shirt 93% Nomex Aramid/5% KevlarAramid/2% Other Fiber Made in the USA or Imported Banded, topstitched collar Topstitched cuff with adjustable snap closure Tailored sleeve placket Fabric made of 4.5 ounces, Nomex IIIA (93 percent Nomex aramid/5 percent Kevlar aramid/2 percent other fiber) Arc rating ATPV 4.1 calories/sq cm