Carhartt Duck Pants - Does waist loosen up more over time? Should I just size up?

Went to Dave's in Manhattan to try in some Carhartt Double Front Flex Relaxed Fit Pants. I'm a 31 waist in Levis, Wrangler, and most other brands, but I tried on a 30x30 and 31x30 and they fit almost the same. I compared the waist on both and it was around an 1/8 of an inch. If I size up to a 32 the seat might be too loose. Does anyone know if the waist will eventually loosen up with wear in this fabric or should I just size up? The 31 waist is nearly perfect while standing, but the waist is just a bit more snug than I am used to.
1 Reply
LeisurelyLoafing
In my experience carhartt runs a bit small. The waist will shrink some on the first wash and stretch back out.