Holster seems to be made of thick, high quality kydex. The quick mount however, does not lock up tight. After attaching the holster to the mount, I noticed that it has quite a bit of play in it. Nearly a 1/16" gap between the two. This results in the holster flopping around excessively with no way to adjust the tension. Yes, it attatches and detatches quickly as advertised but for the price I expected better lock-up between the two pieces. Adding a thigh strap does not aid in this annoyance as the strap attaches to the drop leg and does not negate the holster from flopping around and making rattling noises. I added some Cordura wrap material between the two to stop the rattling noise and it does help with the "flop" somewhat but now it isn't a "quick" system and takes a lot of pressure to achieve lock-up between the holster and drop leg. Maybe I got a lemon but I suspect that this is a common issue. I was thinking of purchasing the "competition" model but I may just have to wait until other holster makers come out with models for the XP PRO. It's not awful, just could be so much better.