Good question. But I couldn't tell you because I really don't know about the materials used like that.
I do remember Kobe stopped wearing the Hyperdunk after the 2008 Olympics and strictly wore the Kobe IV when the 2008-09 season started all the way to the end of it when the Lakers and him clinched the championship.
I'll always feel the Kobe IV changed the shoe game with the low-top cut/design with it being lightweight and internally soft. It was somewhat a taboo with wearing low-top shoes to play basketball for such a long time because of perceived injury potential due to lack of ankle support, especially on NBA courts predicated on the intensity and speed that's naturally a part of that level of competition and skill level.
The Kobe line with the low-top cut was innovative and influential because it became common for lots of NBA players to wear low-top shoes after the Kobe IV came out, including younger generation players who entered the league after he left the game in 2016.
The low-top Kobe shoes are perhaps the most comfortable signatures I ever wore in my life because they were light and soft on the inside. It's like the whole damn interior had cushioning all over.
I'm going to admit the Kobe signature line, particularly the low-top versions, is my second favorite signature line behind Michael Jordan. I'm just going to have to go with Jordans as my top favorite signature line because he did change the game with the innovative designs and optics on them. They've really endured time in the present and going forward. He's also the reason why the younger generation players after him have signature lines with him being the first NBA star to have his own line.