Whether you're a guy or a gal, buying quality clothes requires checking a lot of seemingly minor details. One of these, for pants in your suit, is the waistband seams.
In an article encouraging women to shop more like men (and not, I guess, like our impractical, style-focused method), the Wall Street Journal says:
In pants, the waistband is particularly important, as it provides structure and must hold up to sweat, pressure and twisting. In well-tailored pants, the waistband will have two layers of lining, with some structural seams in between.
Other good advice includes crunching up the suit fabric to make sure it doesn't feel scratchy or stay wrinkled. Good advice, ladies and gents.
To Dress Well, a Woman Should Shop Like a Man [The Wall Street Journal]