Does it really work?
As for your body, the bones of your face are covered by muscles: masseter, risorius, depressor anguili oris (jaw), depressor labii inferioris, mentalis (chin)...
They are striated skeletal muscles with potential for development and hypertrophy.
To improve your face shape, you just need to train them in the right way. JawDesign is the best way to train them effectively, because it offers you sufficient resistance, easy and stress-free training.