Bulwark Flame Resistant 6.25 oz Cotton Tagless Mock Turtleneck Shirt 88% cotton, 12% nylon Made in the USA or Imported Double-layer, FR cotton rib-knit collar, Sized to protect the neck FR cotton rib-knit cuff Arc Rating ATPV 9.6 calories/cm2 (HRC2) Arc rating ATPV 9.6 calories/sq cm