This is a Uncle Mike's Holster known as the Super Belt Slide, model 8615-0.
These Super Belt Slide holster have a flattened profile for optimum concealment. The extra thin laminate conforms to body contours and the medium high ride design positions your firearm for a smooth draw. They have three-slot design on all models for crossdraw" dual-position or strong-side carry and thumb break and retention straps.
Features:
Kodra nylon
Ambidextrous
Size 15
Fits 3 3/4 - 4 1/2 Barrel large autos