80% Cotton, 19% Polyester, 1% Carbon Fibre. 340gsm. Design: Two Tone. Belt Loops, Sew-On. Fabric Technology: Bizflame Ultra, Durable, Flame Resistant, Hardwearing. Pockets: Ruler Pocket, Knee Pad Pockets. Waistline: Part Elasticated. No. of Pockets: 8. Hem: Adjustable. Conforms to Safety Standard: ASTM F1959/F1959M-12 ATPV 16 CAL/CM2 (HAF = 83.7%), CE Certified, CE-CAT III, EN 1149-5, EN 13034 Type PB, EN ISO 11611 Class 1 A1+A2, EN ISO 11612 A1+A2, B1, C1, E2, F1, IEC 61482-2 IEC 61482-1-1 Elim 11 CAL/CM², IEC 61482-2 IEC 61482-1-2 APC 1. Nickel Free. Sun Rating: UPF 40+. Ref: UTPW273