Bulwark Men's Flame Resistant 4.5 Oz Nomex IIIA Vest Jacket Liner with Rib-Knit Collar, Navy 100% NOMEX Made in the USA or Imported Four concealed snap, front fly closures Heavy rib knit cuffs and collar One inside left chest pocket, no outside pockets Snaps into brown duck lined bomber jacket, lined bomber jackets Arc rating EBT 37.0 calories/sq cm