The denim jacket is a quintessentially American piece, so it makes sense that Raf Simons' Fall/Winter '18 collection for Calvin Klein 205W39NYC – a considered study of US culture – contained plenty. This design, rendered in refreshing white, mashes up both classic and contemporary elements, with the relaxed silhouette and pure cotton composition offset by vibrant blue contrast stitching and an exaggerated pointed collar. Partner yours with a checked skirt for a high-low look.