Designers took one of fall's staple fabrics for a turn down spring catwalks. Leather, along with its shinier cousin patent leather, is now a warm-weather must-have. Vivienne Westwood, Givenchy, and Haider Ackermann all showed short-sleeved jackets, while Chloé crafted fire-engine-red leather hot pants. Christian Dior also used light-gray patent leather on a motorcycle jacket for a softer look. So throw out the rule book because leather's in twelve months of the year. Click ahead to see sixteen designers who took on spring leather.