Tanzik Denim - National Geographic Original Multi functional Tubular. Multi functional National Geographic neck tubular for adults designed with recycled materials. Comfortable, stretchable and featuring sun protection, the Original National Geographic neck tubular has plenty of possibilities. Multi functional product designed for all-year-round use. Ideal protection against the cold during high intensity outdoor activities such as trail running, trekking, bouldering, hiking, horse riding cycling or riding a motorbike. Design: National Geographic. Size: One size. Designed for adults.