Dressing for the rainy season (May–November) requires a "fast-drying" mindset. The humidity is high, so cotton is your enemy as it stays wet and gets heavy; instead, opt for moisture-wicking synthetics or lightweight linens. A high-quality, breathable rain shell or a durable poncho is essential for the daily afternoon downpours. For your feet, bring waterproof hiking boots for muddy trails and a pair of "adventure sandals" (like Chacos or Tevas) for river crossings or casual walks where your feet will inevitably get wet. If you are heading to the cloud forests of Monteverde, pack a lightweight fleece, as temperatures can drop significantly when the sun goes down. Always carry a dry bag for your electronics and a "backup" pair of socks in your daypack, as nothing ruins a rainforest trek faster than soggy feet. In 2026, many travelers also use "insect-repellent" treated clothing to handle the increased mosquito activity that comes with the seasonal rains.