People often mention that certain orthodox Jewish groups hold that blue jean skirts are un-tznius and unacceptable for women, to the point of ostracizing them or their children for that. I can't find any articles about it now, but I remember hearing about two children who were expelled from their day school because their mom wore blue jean skirts. Personally, a floor-length blue jean skirt might be the most tznius thing I own: It's like wearing a stiff tarp. (And yes, it's one of my favorite skirts!)
Can someone please explain this to me? I don't get it.