Why are IWI T-Shirts Important? November 30, 2022 Gallery, Group, Image online, themeforest IWI T-Shirts are ideal for casual, special occasions, and are made of 100% cotton. They are also very affordable and long-lasting. It is also a suggested costume for the upcoming impact conference 2022 at the Holiday Inn Airport in Accra. IWI costumes are a way of life; embrace it!