Micro bead neck pillows
I can't travel long distances without my neck pillow and always make sure it has a dome at the front so I can wear different ways. Sometimes I like to spin it round and rest my chin on the cushion with the dome at the back and my head leaning into the head rest.
The dome front is also handy for attaching your neck pillow to your luggage so it takes up no room in your bags.
I have micro beads and memory foam now, so the world is your head rested oyster! The micro bead is super lightweight and squishy. For better support check out the Cabeau Evolution travel pillow.