Should be worn as an undergarment ONLY. Features: 6.5 oz 100% cotton interlock knit FR.Fabric meets requirements in accordance with ANSI/NFPA 2112-2012.Arc rating: ATPV 11.8 cal/cm2.Meets NFPA 70E, ASTM F1506.PPE 2.1 chest pocket Specs: FR/AR 6.5oz Cotton Short Sleeve T-Shirt-NFPA 70E & ASTM F1506-ATPV 11.8 Cal/cm2-Navy or Light Grey Case Quantity: 12 Case Length: 64 Case Width: 42 Case Height: 29