I used this pair of Grim Tim about seven months before I first washed them. When they were still brand new, I was wearing them on a beautiful summer's night at Debaser in Stockholm where I managed to spill a full pint into my lap. Don't know if that had a positive effect on the
outcome, but at least I'd like to think so. In total I've been using them for about 15 months and now they have been blessed with a second wash. Both times inside out at 60 degrees Celsius.