The internal nasal valve is located about 1 cm into the nose from the entrance of the nose. This area is also the most "narrow" part of the nose and tends to pinch in with strong nasal inhalation; that's probably why this device is being marketed mainly to athletes.
The Turbine Nasal Dilator opens this area up and prevents it from collapsing inward with nasal breathing. It mimics the action of breath-rite strips which is placed on the outside of the nose, but is reusable up to 10 times.
This device will minimally or NOT at all help with nasal obstruction due to other factors including: