Now to answer your question, KR ultra-tough lens is a patented product of Yue Mingjing lens, which is made of KR ultra-tough material. Compared with the linear structure of ordinary lens molecules, KR super-tough material molecules have network molecular cross-linking structure and strong impact resistance.
Let me show you a picture, which is more obvious than what I said. I found it in official website, Yuemingjingtou.
This is KR super tough lens, and then why do you often exercise? The shopping guide will recommend this lens to you.
It is the molecular structure of this kind of lens that is not fragile and safer than ordinary lenses.
I'll show you two more pictures, which are the test of this lens by Yue Mingjing's head laboratory.
Just a stress test and an impact test.
So this is why the shopping guide recommended this to you. It's quite conscience. You can consider buying this.
After the answer, the subject can understand. I got this from Baidu, plus some of my own knowledge, and I found it from Yue Mingjing's film official website. Hope to adopt, thank you.