Pool chlorination was not available, and there were concerns about disease. In addition, fibers from cotton and wool swimsuits could clog pool filters. Nude swimming allowed for swimmers to be visually inspected to check for open wounds or other signs of infectious disease.
The lack of chlorination options raised concerns about disease transmission. Moreover, the use of cotton or wool swimsuits could lead to filter blockages. Nude swimming offered a solution by enabling visual checks for open wounds or other signs of illness.