Layer over the dress rather than under if the fabric is structured or embellished, using long coats, cropped jackets, or knitwear that hits at the waist. For sleeveless or strapless shapes, a fitted knit or fine turtleneck underneath can work if the armholes allow. Add tights or tall boots when the skirt has enough volume to disguise them. Aim to keep the dress silhouette intact while adding warmth in clean layers.