Dunlop Purofort FoodPro MultiGrip safety The iconic food boot for (semi)solid contaminated areas Extra smooth finish for easy cleaning SRC rated outsole for excellent grip Slip resistant to assure safe working conditions S4 certified The S4 classification is the second most stringent category with respect to protective features for safety footwear. These features include slip resistance, antistatic properties, energy absorption of the heel region, resistance to fuel oil and a protective toecap. The boots are tested and certified in accordance with the EN ISO 20345:2011 standard.