Safety boots 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. IEC 61340-5-1: Electrostatic discharge resistance (ESD) less than 35 megaohm. P: Sole resistant to penetration. 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). Non-slip SR on ceramic floor with sodium lauryl sulphate solution. SRB: Non-slip ceramic floor with glycerol. SRC: SRA + SRB. WR Water resistant shoe. WRU: Upper part water-resistant. Wide adjustment. Complies with IEC 61340-5-1 (ESD). Double absorption zone. Waterproof Air guns tongue. Drylock waterproof membrane. Eyelets lacing. Antistatic properties. Reflector. ProNose toe reinforcement. Heat resistant sole. Oil resistant sole. Breathable insole. Padded rod.