Forget the classically vampish leather trouser, the leather legging is the style's contemporary update that exudes a youthful vibe and effortless cool. This is the style to invest in. High-waisted disco trousers are the perfect solution to party going separates, while biker style leggings, embellished with zips and buckles, put an edgy spin on the look. For ethical or more affordable fashion, go faux, while labels like Rag and Bone bring the high fashion stakes with the real thing. Best worn with a chunky knit and classic loafers for a casual chic or simple blouse for a dressier look.