I don't think they're necessarily any different from any other boots. All of the CAT boots I own are electrical hazard rated. Great boots, love them, very comfy. Still got shocked just today due to a wet extension cord, and wet gloves even with a gfci. I don't think it's worth all that much. When you think about what they protect you from, that is current going from your hand to your feet, it doesn't sound like a typical scenario. From all of massive amounts of safety stuff I've been exposed to, it sounds like the real hazard is from one arm to the other, or any other similar combo that passes through your heart. The electrical hazard rated boots are only for standard voltages under 600v. I'm not worried about that going through my boots. The kind of voltage you worry about going through your boots (distribution high voltage) is going to go through your boots no matter what rating they have. Medium voltage is considered 600-35,000V. It's the kind of accidents you see at those voltages and above where current going though your feet is the problem, and special rated boots aren't going to do anything about that.