Dunlop Acifort Heavy Duty full safety ESD Basic chemical resistance and worker protection Nitrile and polymers enhanced PVC compound for basic chemical protection Strong abrasion resistant outsole for extra durability ESD certified to protect against electrostatic discharge (EN 61340-4-3, class 2). Suitable for use under protective suits (EN943-1 certified) SRA certified slip resistancy The SRA classified boots are tested and certified for slip resistance on ceramic tile floors covered with a dilute soap solution. The tests are based on measuring the coefficients of friction in forward heel slip and forward flat slip state. The results provide a good indication of the actual slip resistance of the boots in practice on slippery tile surfaces.