These are cool, custom made 3D printed earphones for similar (albeit expensive) pricing to premium ear buds.
NORMAL uses an App that takes photos to determine the size and shape of your ear and then prints an ear bud that will fit you like a glove.
NORMAL is opening a factory in Manhattan where you will be able to view your earphones being made. They are setting up 3D printers, CNC machines and assembly lines to produce them on the spot.
Be interesting to see how they scale, I imagine it would difficult to trust this to overseas 3rd party manufacturing when each is built for a particular customer and delivery time is expected in days not months.
For years we have been talking about mass customisation and have seen both vehicle and clothing manufacturers offer mass customisation but it will be interesting to see if this is new trend starting for mass customisation of personal electronics.