100% Cotton. Fabric: Bizweld. Design: Plain. 330gsm. Fabric Technology: Flame Resistant, Protection Against Contact Heat, Protection Against Convective Heat, Protection Against Radiant Heat. Belt Loops, Protection Against Molten Metal Splash, Zip Fly. Pockets: Ruler Pocket, Back, Cargo, Mobile Phone. Waistline: Elasticated. No. of Pockets: 7. Conforms to Safety Standard: ASTM F1506, ASTM F1959/F1959M-12 ATPV 11.2 CAL/CM2 (HAF = 80.4%), CE Certified, CE-CAT III, EN ISO 11611 Class 1 A1+A2, EN ISO 11612 A1+A2, B1, C1, E2, F1, IEC 61482-2 IEC 61482-1-1 Elim 8.3 CAL/CM², NFPA 2122, NFPA 70E, UKCA. Sun Rating: UPF 40+. Ref: UTPW472