My Hakama is tetron, and I wash it in a machine with no problems once or twice a month. It is getting a bit of wear - but I expect that after 3 years. I loved Neil's comments about dry cleaning! When living in Japan, I regularly had my hakama dry cleaned. It was only 200 yen, and it came back all pressed and folded PERFECTLY - it was like getting a new hakama every 2 weeks for $1.50! When I moved back to Hawaii, I took the hakama to the local dry cleaner (who assured me they knew what to do with it) and the pleats were DESTROYED. Live and learn!