Instead of expensive plugs, or fake looking toupeés, they came up with a very natural looking solution. A tattooed-in buzz cut.
It's called Micro Hair Technique, and it took the creators years to develop. The way they do it is by mixing and matching different shades of ink to replicate the look, size and shape of micro hairs in men's heads.
Because the procedure costs many many times less than something like a hair transplant (which can cost up to £25000) MHT is becoming really popular. They've now opened locations in the United States.