Work boot. Electrical resistance (between 0.1 and 1000 Mega Ohms). BGR 191: Adjustment for orthopaedic shoes according to German standard BGR 191. The shoe is tested with orthopaedic soles adjusted in accordance with EN ISO 20345 Energy Absorption at the heel (tested at 20 Joules). Oil resistant sole. HRO: Heat-resistant sole component tested at 300 °C. IEC 61340-5-1: Electrostatic discharge resistance (ESD) less than 35 megaohm. Shoe made of leather and other materials, excluding all-rubber or all-polymer shoes + closed back + A + E. O2: O1 + WRU. SRB: Non-slip ceramic floor with glycerol. WR Water resistant shoe. WRU: Water resistant upper part; complies with IEC 61340-5-1 (ESD). Double absorption zone. Waterproof Air guns tongue. Drylock waterproof membrane. Eyelets lacing. Antistatic properties. Heat resistant sole. Oil resistant sole. Breathable insole. Padded rod.