100% Cotton. Fabric: Bizweld. Design: Plain. 330gsm. Fastening: Stud, Zip Fly. Fabric Technology: Durable, Protection Against Contact Heat, Protection Against Convective Heat, Protection Against Radiant Heat. Protection Against Molten Metal Splash, Twin Needle Stitching. Pockets: Ruler Pocket, Side Pocket. Waistline: Part Elasticated. No. of Pockets: 3. Conforms to Safety Standard: 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, UKCA. Sun Rating: UPF 40+. Ref: UTPW1488