uvex 68317 safety boots, black/blue, S1, width 10, size 35-52 General characteristics: extremely light, perforated S1 SRC lace-up safety boots. Suitable for people allergic to chrome: made of synthetic materials. All sole materials are free of silicones, plasticizers and other substances that affect wetting agents. Protective features: new polyurethane sole technology - uvex i-PUREnrj - with optimum shock absorption in the forefoot and heel, excellent rebound in the entire midfoot and optimum stability thanks to the foam heel cup. Complies with ESD regulations with a volume resistivity of less than 35 megaohms. New, wider, 100% metal-free uvex xenova® toe protection - compact design, anatomical shape, good lateral stability and heat conductivity, incre