First of all, it can't
First of all, it can't be used to sleep on plane, as the bulk behind the neck is too big for a natural position to sleep. Secondly, no neck support.
Taking nap on the table also not ideal with this pillow, you still have to rest your hands on forehead, which get red after a while (same as without pillow).
Can be used as eye shield at best.
Material is quite good, but function is lacking. And price is high.