A clothing manufacturer's claim of durability should not be taken as anything but marketing rhetoric. Duluth's Fire Hose pants may be great and very durable for cotton pants, but I seriously doubt they come close to the durability of nylon. Wander through the RailRiders website and you'll find they refer to their line as the "Toughest Clothes on the Planet". Is that true? Maybe, maybe not -- but they're probably tougher than most of the cotton. Just my $.02. YMMV
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Better is the Enemy of Good Enough.
Okay, what’s your point??