If you’re planning to rappel down a waterfall, you’ll want to wear a swimsuit underneath your clothes (and bring water shoes if you’d like to go swimming after!). Remember to wear pants and shorts long enough to provide a barrier between the harness and your legs, and wear a pair of hiking or tennis shoes with thick soles and good traction. Apply sunscreen and bug repellent before heading out too. If you are rappelling or canyoning with a tour company in Costa Rica, they should provide all the safety equipment you’ll need, including a harness and helmet. Before your rappelling trip, ask the tour company if there is any additional gear or supplies you’ll need to wear or pack.