Thank's all. I should have been a bit more descriptive
The material is not "plastic" it is "Kydex"
This "Hybrid" IWB Holster that I crafted, I made from "Kydex" and Leather. You can do a web search for Kydex forming.
It fits, and functions perfectly! Very comfortable. When a Holster is made entirely of Kydex, you have to be careful of the formed indents of the pistol - so as not to "Lock" in the pistol. This is not much of an issue with hybrid holsters, as the leather offers some give.