The Rock Fall Ohm electrical hazard safety boots are certified with to ASTM F2412-18 to withstand electrical risks of 18kV in dry indoor conditions. Protection deteriorates rapidly in humid, damp and wet environments and with wear. Intended as secondary source protection equipment, not for live working. With the BOA Fit System, turn the dial to tighten or loosen the boots. Dual density EVA nitrile rubber outsole with abrasion resistance and shock absorption. Includes an Activ-Step recycled foam footbed. Meets Standard EN ISO 20345:2011 SB P E WRU FO SRC, ASTM F 2413-18 M/I/C PR EH.