Has anyone heard of this before? Source is BBC website - rather interesting story. Apparently it is dangerous. The equipment consists of only one hand wrapped in wet flax cord and sand, plus they claim to smoke lots of cannibis (see pic 10 - guy on the left looks pretty baked.)
That looks pretty hardcore, first time I have seen this though found the below video on youtube. I am not sure what the rules are, can they only punch with 1 hand (the wrapped one?), looks like kicks are ok not sure about grappling though.