why do all jeans have spandex

leading paragraph: Your old jeans feel stiff and restrictive. You want the classic denim look without sacrificing comfort. Stretch jeans solve this problem, but are they still "real" jeans? snippet paragraph: Most jeans now include spandex (elastane)[^1] to add comfort and improve shape retention. Pure 100% cotton denim doesn’t stretch, which can feel restrictive. Adding […]