You can wear a bathing suit at Kings Island, but you must adhere to a specific dress code that depends on which area of the park you are in. In the Soak City Water Park, appropriate swimwear—typically made of nylon, lycra, or other synthetic materials—is mandatory for all slides and pools. Swimwear that is transparent, features metal buttons, zippers, or buckles that could damage slides is prohibited. Outside of the water park area, in the main dry park, shoes, shorts, and a shirt must be worn at all times. This means you cannot walk through the main park in just a bikini or swim trunks; you must put on a cover-up or traditional street clothes once you leave the Soak City gates. Additionally, the park enforces a policy that clothing must not display obscene or offensive pictures or slogans. For those who arrive without a suit, the park features retail shops like Sandals Beachwear that sell a variety of swimwear for all ages.