Designer Hwan Heo of London-based label Heohwan Simulation is a master of simple yet striking designs. It's the decision to use a captivating liquid-silk-like fabric on tailored pants, cut an unexpected rounded edge on an otherwise straight hem, or perfectly place an ambiguous stick pattern on a dress that make the looks of the designer's Fall '12 collection memorable. In case you missed the Spring '12 collection (and if so, click here to see it), zippered hot pants and geometric embellishments have hardly ever looked so good.