The Beeswift Nordic design boiler suit is 300 gram, 100% cotton drill fabric with flame retardant treatment. FR reflective tape (Nordic Pattern). Concealed stud fastening front up to the neck. 1 left breast pocket with flap and 2 front hip pockets. Knee pad pockets. Plain back and hips. ISO11611: 2007 Class 1 A1 - Protective clothing for use in welding. ISO11612: 2008 A1. B1. C1 - Protection against heat and flame. Does NOT conform to EN ISO 20471.