Yi-Hsiu Yeh, an architect and educator in Los Angeles, designed a line of handbags that uses principles of architecture and engineering. The A4 bag is a combination of both functionality and style. It is made of wool felt, and conceptualized to be used both during the day and night. Although the product is very desirable as is; the fact that it is designed by an architect enhances its desirability even more. People don’t usually associate architects with designing fashion — it is very rare.