I think it was last year or the year before I bought a Qi cashmere hoodie from a sample sale site. I generally wear it for winter commuting.
This season it developed a mystery hole, not a moth hole. This morning I was putting on and I ripped a big hole in the armpit. Then I realized there was another hole in the other armpit. I honestly think the yarn is thin, weak and poorly spun. I will just use it for commuting for the rest of the season, it'll always be under a coat, and then trash it.