same as all of my clothes, when i've worn them for "a while". So I might wash them after a day, or I might wash them after two days, or I might get a week out of them if I only wear them for a couple hours between when I get out of work and when I'm done being civilized for the day. Going to the laundromat is expensive and a pain in the ass, gotta get my money's worth out of these clothes.