Helly Hansen Work Shirt Mens L/S Base Layer Fargo FR Crewneck 75090 49% Kermel, 49% FR Lengzing Flame resistant base layer Anti-static Highly resistant to abrasion Moisture moving material Flatlock seams Double knit cuffs CAN-CGSB 155.20 ASTM F2302 ASTM F1506 CSA Z462 NFPA 70-E