Bulwark Flame Resistant 7 oz Cotton/Nylon ComforTouch Work Shirt 88% Cotton, 12% Nylon Made in the USA or Imported Two-piece lined collar One-piece lined cuffs with button closures Sleeve vents Fabric made of 7 ounces, 88 percent cotton/12 percent nylon Arc rating ATPV 8.6 calories/sq cm