This is a DeSantis Gunhide Inside Waistband Holster known as the 137, model 137KJ37Z0.
The Slim-Tuk(R) is a new minimal ambidextrous IWB holster fashioned from Kydex(R) sheet. One of the most unique features about this IWB holster is that it uses their tuck-able 360(R) C-Clip" which affords the wearer unlimited mounting options. The hardware can easily be reversed to change from right to left hand. The Slim-Tuk(R) is precision molded and has adjustable tension and a rugged 1.75" nylon clip.
Features:
Precision molded Kydex IWB holster
Completely ambidextrous
Included C style clip can be adjusted for both height or cant for user preference