Neck pillow

Airplane seats suck. You don't see anyone wishing for one in their home because their discomfort is pretty much unparalleled. While you can't do much to change that, you can improve your comfort with a neck pillow. That's why you see them on so many people when they fly. The best ones contain memory foam or micro beads (i.e. micro-polystyrene),

Eye mask

Wear eye shades. Not only will you feel more rested if your eyes aren't bathed in fluorescent light, eye shades tell the flight staff and everyone around you that you are trying to get some sleep. Also, eye shades show the flight attendant that you will need to be awakened at the end of the flight.

Silkscreen printing or Offset Color Printing