9 oz. FR treated 100% cotton sateen fabric protects from light sparksAnodized snaps do not corrode and prevent flashbackBlack pop-up welders collar provides adjustable protection from sparks and debrisHook-and-loop harness flap on back provides convenient compatibility with safety harnesses1 internal lower hip pocket offers convenient storage2" retroreflective silver FR tape enhances visibilityCertified to ISO 11611, ISO 11612, ASTM D6413Meets CSA Z96-22 Class 2 Level 2 and FR