This was the second pair of 81s I've purchased. They look great and are comfortable. The last pair I had lasted 2 years with intermittent use. This pair only made it 2 months before wearing thin where the big toe sits on each shoe. I don't know if I was harder on this pair (wearing them daily to my part-time research job w/ lots if walking) or if the quality has diminished. Sadly I'll probably have to look for something else.