https://www.reddit.com/r/UkraineWarV...te_of_the_art/
Reddit, so grains of salt on the source but...uh...I don't think the helmets the Russian soldiers are apparently being sent to war with will do very much. Given the damage sustained from an admittedly very large man punching it, I'm questionable that it would effective for anything. Doesn't seem like it would protect against any kind of puncturing, and I also don't think it'll be very effective against hard blunt-force hits, either.
Like, this guys helmet seems like it would be more useful in war than this piece of metal -