While not strictly mandatory, water shoes are highly recommended for a visit to Siam Park in Tenerife. The park is vast, and the paths between attractions are made of materials that can become extremely hot under the Canary Islands sun, making walking barefoot quite painful. Additionally, the surfaces can be slippery when wet, and water shoes provide much-needed traction. Most of the major slides and attractions allow you to wear them, though some high-speed "body slides" might require you to hold them or tuck them into your waistband for safety. If you don't bring your own, the park's gift shops sell them, but they are often more expensive than buying a pair beforehand. Using water shoes also eliminates the need to leave flip-flops at the entrance of a ride and walk back to retrieve them, allowing you to move through the park more efficiently and comfortably throughout the day.