Shein … Shein (/ ˈʃiːɪn / ⓘ SHEE-in; styled as SHEIN; Chinese: 希音; pinyin: Xīyīn) is a global e-commerce platform specializing in fast fashion. While the company primarily focuses on women’s clothing, it also offers men’s apparel, children’s wear, accessories, cosmetics, shoes, bags, and other fashion items.