Bodysuits and leotards have many similarities, and the two names sometimes are used interchangeably, but they differ mainly in purpose. Girls' bodysuits are a type of girls' clothing more commonly worn with everyday outfits. They are typically made from soft and breathable materials such as cotton. Leotards, on the other hand, are primarily designed for specific physical activities, such as gymnastics and dance. They are more form-fitting, often in sleeveless styles, and are made of flexible materials such as nylon.