High-safety shoe. 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 insoles adjusted in accordance with EN ISO 20345. CI: Insulation against cold energy absorption at the heel (tested at 20 Joules). HRO: Heat-resistant sole component tested at 300 °C. S1: Shoe made of leather and other materials, excluding all-rubber or all-polymer shoes + closed back + SB + A + E. S2: S1 + WRU. S3: S2 + P. SB: Shoe with toe protection tested with 200 J impact and 15 kN compression (with oil resistant sole). SRB: Non-slip ceramic floor with glycerol. WRU: Water resistant upper part. Soft-padded memory foam upper. Complies with IEC 61340-5-1 (ESD). Double absorption zone. Water repellent. Antistatic properties. Heat resistant sole. Oil resistant sole. Breathable insole.