The SIUF (Shenzhen International Brand Underwear Fair) is an annual international trade fair for branded underwear, held at the Shenzhen Convention & Exhibition Center in China since 2006. As the most influential trade fair of its kind in all of Asia, the SIUF attracts over 10,000 trade visitors every year and presents a wide range of trendy fashion from the underwear and bathing textiles sectors. The fair also offers insights into new industry developments, such as functional leisure fashion, athleisure, body-shaping textiles (shapewear) and loungewear. The highlights of the event include the lavish opening ceremony, award ceremonies and a brand fashion show. The organization of the fair is handled by Tarsus Exhibitions and the Shenzhen Underwear Association, with the support of the Guangdong Textile Association. The SIUF offers trade visitors from the underwear industry the opportunity to learn about current trends and developments, make new contacts, and maintain existing business relationships. The SIUF takes place annually, and therefore for the 21st time previsibly in March 2026 in Shenzhen.