I don't know what it is, the mix of leather jackets & sweat pants make a good look - a casual sort of look that is. Paired with a lace up wedges or pumps you are well on your way to comfy chic. Try a silk top or a loose fitted tee (A. Wang) style to complete the look and throw on your favorite leather jacket. A beanie or a cute hat with some statement piece jewelry can really make the look. VOILA!