The material that Fobus uses is not Kydex. I had trouble with mine for my G-27 and G-33. It would pull the holster off your belt before it would release the firearm. You can't heat it to reform the holster like you can do with Kydex. I put them on the shelf and made my own Kydex holsters for them.
USAF Retired, CATM, SC CWP, NH NR CWP, NRA Benefactor
To preserve liberty, it is essential that the whole body of people always possess arms, and be taught alike, especially when young, how to use them... -- Richard Henry Lee, 1787