If you invest in one dress style next season, make sure it has ruching – a romantic take on body-con, and much more forgiving. Carefully-positioned ruching has mighty figure-enhancing potential; it adds curves to slimmer frames and those with curvier silhouettes will appreciate its ability to stretch in the right places. Givenchy balanced ruched detailing with accordion pleating to create a dress that will be at the top of many wishlists next season, while Calvin Klein used it to cinch it in the waist.