What is the material of mobile phone case that can resist falling?

Let me start with my personal use: 1. Silica gel has excellent fall resistance, but its disadvantages are also obvious. Airtight mobile phones are prone to fever. 2. The leather phone case has the miraculous effect of blocking screen dust, but it's really hard to say that it's resistant to falling. 3.FlexShock, this material is probably unknown to many people. It is a patent of tech2 1, a British professional mobile phone case manufacturer. I've been using it recently, and the anti-fall performance is good. I said it was a 3-meter anti-fall, so I threw it at the normal height, and the mobile phone was fine.