The fibres used in this fabric include 60% Modacrylic, an inherently flame retardant fibre that does not combust, the fibres are difficult to ignite and will self-extinguish, providing natural flame retardancy without the need for an FR chemical treatment in the textile process. These fibres are blended with 39% cotton and 1% carbon fibre for added strength and protection against electrostatic discharge hazards. Features: CE-CAT III Inherent flame resistant qualities will not diminish with washing Protection against radiant, convective and contact heat Sew on flame-resistant industrial wash tape Two-tier knee pad pockets allowing two positioning options Radio loop for easy clipping of a radio Triple-stitched seams for extra durability Two-way front durable brass zip for easy access 50+ UPF rated fabric to block 98% of UV rays Shell Fabric: Modaflame: 60% Modacrylic, 39% Cotton, 1% Carbon Fibre 280g Standards: ELIM TESTING IN PROGRESS EN 1149 -5 EN 13034 Type 6 EN ISO 11612 A1+A2, B2, C1, F1 EN ISO 11611 Class 1 A1+A2 IEC 61482-2 IEC 61482-1-2 Class 1 ASTM F1959/F1959M-12 ATPV=8.4 Cal/CM2 (HAF=75.8%)