This is a DeSantis Gunhide Inside Waistband Holster known as the 031, model 031BA5EZ0.
For concealment with comfort" the Insider(R) contains design features to minimize bulk. It is made with a heavy-duty spring steel clip positioned high for deep cover. The leather is soft and un-molded. Available in black.
Features:
Minimal design to reduce bulk
Comes with low concealment metal spring clip