Someone at the factory where they make these pillows forgot to put the filling inside, when you put your head on the pillow your head goes straight to the mattress, as if there is no pillow under your head!
€18, what a joke, you need 4 of these to make 1 normal pillow, I have seen better on the market for €5.
If this company increased the filling by 4 times, then I think it would be very nice, but because it doesn't, don't buy it! Just a waste of money.