Black classic boyfriend jeans are the version that works for dressing up because the colour reads smart despite the relaxed silhouette. The boyfriend fit is not too tight which means you can pair them with dressier tops and they work without looking out of place at more formal occasions. Black also means they pair with everything and work across seasons which gives them serious mileage in your rotation. Black boyfriend jeans also work for layering because the fit means they sit comfortably under jumpers and longer tops. The silhouette is relaxed but the black colour prevents the whole thing reading as purely casual. These are the jeans that work harder than just weekend wear because the colour makes them versatile enough for actual dressing.