You can absolutely wear shorts at Siam Park in Tenerife, but they must be "swim shorts" made of appropriate aquatic fabric like nylon or polyester. Traditional denim or cargo shorts with metal buttons, zippers, or rivets are strictly prohibited on the slides because they can damage the fiberglass flumes and pose a safety risk to the rider. Most visitors wear board shorts over their swimsuits for extra comfort and coverage. It is also highly recommended to wear water shoes or "swim socks" while walking around the park. In 2026, the volcanic stone paths can become extremely hot under the Canary Islands sun, making barefoot travel painful. While you can wear casual t-shirts and walking shorts in the common areas, restaurants, and the "Siam Beach" area, you will be asked to remove non-swimwear before boarding high-speed attractions like the "Tower of Power" or "Singha." Using a rash guard is a smart alternative to a t-shirt if you want sun protection while sliding, as these are permitted on almost all attractions without restriction.