While girls can technically wear leotards for swimming, it is not recommended. Leotards are designed for gymnastics and dance, not for use as swimwear. Swimsuits are specifically made with lightweight, quick-drying, and chlorine-resistant materials, unlike leotards. Moreover, leotards may not offer sufficient coverage or support for swimming activities. Therefore, choosing a proper swimsuit for swimming rather than using a leotard is better, as it may not provide the necessary functionality and comfort.