The very best high heel shoe inserts must tackle the problem of toe pain and foot pain in high heels in a new way in all styles of heels.
There was nothing existing in high heel inserts comfort prior to 2015 that was effective and worked for all heels and all foot types. There was no high heel inserts that were customizable to the foot and were not bulky and did not move about inside the shoe - thereby being useless in keeping the foot in place. If the inserts don't stay in place and become loose in the shoe they cannot keep the foot in place! The worst offenders are gel insoles or gel inserts because there is no glue strong enough to keep them in place.
The following is an example of reasoning from 'First Principles' in an invention of high heel shoe inserts. Gravity exists, gravity works in a high heel shoe as something with a mass (a person’s weight attached to a foot on a downward slope) that is being pulled down by a force – the force of gravity. F=GM m/r2 This is the problem. The solution is to stop gravity from pulling the foot down. The solution is to stop problems of pain in the toes and forefoot from happening in the first place, not just cushioning with gel or bandaging the toes and the ball of the foot after they are painful. It is also a solution that considers the problem of foot pain in heels from both the horizontal and vertical surfaces.
I reasoned by ‘First Principles’ that what was needed was a means to physically stop the foot from sliding forward. The means had to be something that was comfortable on the foot, did not crowd the shoe and also stayed in place against hundreds of pounds of pressure on it. This is how I came up with my invention of high heel inserts that I called Killer Heels Comfort. My invention is not an extension or a reiteration on a theme that has been executed before in hundreds of foot cushions, it is completely novel. It is an example of Reasoning by First principles and not by analogy.