Worn mostly for work 5 days a week 40-60hrs in a mid size production brewery, some weekends and traveling. Lots of physical movement, wet/humid conditions, both extreme hot & cold conditions, chemical (caustics, acids) & abrasives (mill, DE dust, salts) exposure. They've been my main pair for the better part of the last few months but I do rotate them out for my other jeans semi-frequently.
5 washes and 1 soak so far. Washed roughly every 3 weeks, give or take. Usually hand washed in a bath tub with arm & hammer + oxi clean detergent and scrubbed with a soft horse hair brush. They have been washed in a machine once or twice on cold, gentle, no spin. Usually hang dried but they've also been through the drier once or twice on low but always pulled early and hang dried the rest of the way.