I was just looking at those firehouse pants from Duluth. How long have you had them, and how hard do you use them?
How is the fit? I'm 6'6" and 270 lbs. 40" x 34" would be my size depending on cut. I am flexible, and split the crotch area on my Carharts when they were new. They were solid but the cut of the pants was not good for me. Mobility was junk!
I had to get a much bigger waist size just to fit my legs in.
I'm pretty much the opposite of you size-wise. I'm about 5' 10", 170 lbs and wear a 32x32. I would agree with others that they run a little bit long, but I'm fine wearing the same 32x32 I wear in most other things.
I've been wearing the firehose in both regular and flex since the first of the year daily for work. I work on yachts - sounds a little fru-fru I guess, but it's damn hard on pants. I would normally have totaled at least one pair of Levis by now. I'm constantly crawling around in very tight bilges and engine rooms, getting oil, gas, diesel, and battery acid on my clothes. Minimum restriction is important since I'm usually contorting myself into some impossible to reach area. Durability is important to me as well since as I said I was destroying (as in huge holes) a pair of Levis about every 6 months.
I need to look presentable for work and the Duluths do that fine. I need something with a good pocket configuration so I can keep my cell, a small flash light, keys to the marina, my van, the office, the house, the boat I'm on...etc, plus whatever tools I need when I need both hands to scramble/climb up on that hard top or down into some awkward hole in a bilge. And I wanted something that sheds water easily since I'm obviously working around the stuff and can't call off working outside just because it's raining.
So far, they've done the job. The regular firehose material is a little stiff at first and certainly warmer than the flex but I've been OK with it so far. Granted, when it's pushed 90+ I've tried to make sure I was wearing the flex pants on those days. As to durability I've only managed to get one tiny hole in any of them so far but that was from battery acid that I didn't get rinsed off fully. I don't know any clothes that will stand up to that for long. They have done a pretty good job of shedding water, say from rain or indirect spray from a hose (cleaning/washing stuff) but are not waterproof. And they look presentable when you have to deal with the public. They've even done a pretty good job of holding off stains, except for some black silicon I got on one pair...once that sets up you're pretty much screwed. They've even held up against sparks from the grinder while building a bumper. I managed to burn holes through my shirt, but not the pants.
I still wear jeans when I'm not working, and I usually wear wicking clothes when I'm hiking. But if you need something for physical work, I would fully recommend the firehose pants.