100-Percent FR treated preshrunk cotton knit, 7.5-Ounce (250 GSM) material and all components meet cgsb 155.20-2000 thermal protective performance (tpp) value with the spacer: 7.5/contact test: 5.9 meets ASTM f1506-10a, NFPA 70E and CSA z462-15 ATPV 9 cal/cm ² (arc thermal protective value) arc 2 arc rating category sewn with inherently FR thread left chest pocket crew collar neck comfort knit cuffs.