GREAT SMOKY MOUNTAINS NATIONAL PARK LOGO T-SHIRTS. These NEW park logo tees are now organic, so you can do your part for the environment by wearing these redesigned tees. Produced exclusively for Great Smoky Mountains Association and available only from us! 100% sturdy yet comfy pre-shrunk cotton. Proceeds benefit the park. Colors: Blue or Brown Available. Sizes: Small to XXL. $18.99