I just unpacked and put it on. I'm 6ft 3in, 215lbs, pant size 14" x 14" and the big ones fit me. There is a fly. Can't comment on durability, they seem to be of decent quality. I bought these as a lightweight mid base layer for an upcoming snowshoe hike in Frisco, Colorado. The photos show that the materials have to do a good job to ensure the desired heat and moisture absorption. The fit is great at the waist, relaxed at the crotch, tight at the hips and calves and tight at the ankles. I have washed them in cold water along with other items and they seem fine. Hey, for the price? Jump on it.
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