You are looking for a "freedom to operate" opinion. Few lawyers will issue those anymore because of the malpractice risk.
You'll want to (a) identify the countries where you will sell the product; (b) disclose the product features (and preferably provide a specimen) to a lawyer in each country; and (c) have that lawyer confirm that there are no issued patents still in force that cover the product.
Your link was google.kr, so I'm assuming you accessed from Korea. If you plan to sell the shoes only in Korea, US patents don't matter (unless they get exported to the US). But Korean patents will matter.
I hate to give the very expensive "see a lawyer" advice, but see a lawyer. As one of the comments mentioned, variants of this have been around for a while, so if you are positive that you are implementing something more than 30 years old, you should be fine. Between 20 and 30 years, there are sometimes patents that exceed the 20 year lifespan (at least in the USA, due to patent term adjustments).