This chapter focuses on the surface of a smart garment as a dynamic interface. The use of the garment’s surface as an interactive display opens up an array of new applications. Novel developments in interactive and wearable textile surfaces for garments display data from input sources like sensors and cell phones. The integration of these surfaces into the garments is evaluated regarding wearability and the wearer’s interaction. This chapter provides a list of considerations for human interaction with smart garments and dynamic visual interfaces, which are an essential tool to design usable, smart garments.