Most standard travel pillows have a semicircular shape that wraps around the neck to support the neck, head, and chin. These U-shaped pillows often have memory foam or microbead filling, but there are also inflatable neck pillows. In addition, standard pillows make great travel pillows, and plenty of rectangular-styled pillows compress down for better portability. Finally, while traditional pillows might be better suited for a traveler in the window seat, there are unique J-shaped travel pillows that are perfect for supporting the neck and head of someone sitting in the middle or aisle seat.