The Costal Sombrero by Outdoor Research is perfect for an adventure in a warm, wet climate due to its seam taped, waterproof/breathable 40D Gore-tex Paclite fabric. The foam-stiffened brim and flexible, circumferential piping along the brim allows this hat to keep its form and provides added wind resistance. The Coolmax mesh-lining and TransAction headband gives it more comfort and moisture management, and the vent at the back of the crown allows ventilation.