.Did a Google search and found insulated boots that go up to your knees and rated for 20,000 volts for $189.99. Info stated they have a steel.toe. We had electrical rated work boots that were rated for 1,000 volts and had a non metallic toe protection. I never saw a utility worker with anything but 6 or 8" high leather work boots. Granted they are in an insulated bucket while working on 13.2 KV lines.( even while it's raining ). I retired from a large hospital / research centers that had a strict safety department and when we switched 13.2 KV services, tie breakers etc we just stood on rubber mats that our rubber glove seller & test company sold us along with 1 KV rated work boots along with proper PPE. Rubber mats ran entire length of 4,160 & 13,200 volt switchgear room breakers. Just wondering what you are performing to need at least 5 KV insulated work boots. Please be very careful ordering work boots from Graingers. I sent them an e mail asking if they had any electricians work boots with a non metallic toe protection NOT made in china. Yep only have one model that was around,$150. When they finally arrived had the catalog number they supplied but they were made in cheating lack of quality control china. Tried three different inter soles including the $50 Dr Scolls ones. Tried thin socks, thick docks etc. After 15 minutes my feet were killing me. Tried breaking them in at least twenty times. Never had a problem breaking in Army or work boots but Chinese boots are not for me. Hospital purchased us one pair a year.