You can certainly wear flip flops to walk around Universal’s Volcano Bay, but you are not permitted to wear them on most slides or attractions for safety reasons. The park is designed with "Waturi" culture in mind, featuring heated sidewalks and sprayers to keep the ground cool, so many guests choose to leave their footwear in the provided "shoe cubbies" at the entrance of each ride. If you wear your flip flops into a ride queue, you will almost always be asked to hold them in your hands or tuck them under your arms during the descent, as they can easily fly off and become a hazard to other guests or clog the water filtration systems. For the best experience, many frequent visitors recommend form-fitting water shoes (like brands such as Crocs or specialized swim shoes) that have heel straps; these are often allowed on many of the larger raft rides and lazy rivers, providing better grip and protection for your feet while remaining securely attached during high-speed maneuvers.