Made from sustainable recycled polyester— Uses less energy and less water than traditional polyester during production. Recycled polyester also reduces carbon dioxide emissions. All-day sun protection for head, neck, and eyes—Our full-coverage baby flap hat with extra neck and shoulder protection keeps baby covered all-day, reducing sunscreen application in those areas. UPF 50+ sun protection—Our UPF 50+ hats offer the highest sun protection available, blocking 97.5%-99+% of harmful UV rays. Lightweight, quick-dry material keeps baby comfortable—Our sun protection hats are made from soft, microfiber material with a wicking liner to pull moisture away from skin to keep baby cool.