They are indeed a pair of wellies with a bit of aluminium stuck on the front.
I currently have a pair of haix - goretex, high legged, military looking steel toe capped boots.
As Kenny has said they are for Ultra high pressure jetting. At least a couple of times a year I stripe across my boots and it really tests the leather and if on the crease it lets your toes have a tickle.
I am always on the look out for the best boots etc but I fear they are not them
Rob