Keeping bugs away in Costa Rica requires a multi-layered approach, as the country's tropical climate is home to a vast variety of mosquitoes, "no-see-ums," and ants. The most effective defense is a high-quality insect repellent containing 20–30% DEET or Picaridin, which should be applied to all exposed skin, especially during the "golden hours" of dawn and dusk when mosquitoes are most active. For those seeking a natural alternative, Oil of Lemon Eucalyptus is the only plant-based repellent recommended by the CDC for its effectiveness. Additionally, wearing light-colored, loose-fitting clothing with long sleeves and pants can physically block bites while keeping you cool. Many travelers also treat their clothing with permethrin spray before their trip, which kills insects on contact and lasts through several washes. When booking accommodations, choosing rooms with air conditioning or high-quality window screens is vital, as it prevents bugs from entering your sleeping space. If you are staying in an eco-lodge or open-air cabin, always use a mosquito net over your bed. Finally, avoiding heavily scented perfumes and soaps can reduce your "attractiveness" to certain insects, ensuring your "Pura Vida" experience isn't interrupted by itchy bites.