I have had three pairs of Meindl boots have the soles crumble.

One pair I had used in Tanzania, one pair virtually unused at my place in Singapore and the other pair in Borneo. One pair was a replacement for the first pair that failed.

It seems warm - hot humid weather will do it. I still have a pair in moderate climate in Australia that are doing ok.

Won't buy with that type of sole at again. I have other shoes that have had the soles fail in Singapore.

Cheers, Chris