If you take only one hat on your long summer adventure of backpacking and trekking, it should be the Women's Arroyo Bucket Hat from Outdoor Research. With UPF 30 construction and lightweight, breathable fabric, you'll be protected from the rays no matter how long you stay out in the sun. Patterned Dri-release(R) cotton reverses to solid-colored nylon for a hat that can quickly switch from subtle to spunky kick.