This is a BLACKHAWK Inside Waistband Holster known as the A.R.C. - Appendix Reversible C, model 417525UG.
The A.R.C. (Appendix Reversible Carry) IWB holster is designed to be as comfortable as it is versatile. With ambidextrous carry capability" two belt clips and adjustable retention detent" this holster is a must have.
Features:
Soft yet durable injection molded polymer material for comfort
Fully ambidextrous
Includes two cant and ride height adjustment belt clips for 1.5 to 1.75 belts
Fits S&W M&P Full 9/.40/.357/.22 Compact 9/.40/.357/.45 (not Pro)