Middle of Back MOB Concealed Gun Holster for Glock 19 17 22 23 37 31 38 25 32 29 30 36 Gun holster for concealed carry fit for full size semi-autos. Inside the Waistband (IWB) carry method. Material is high quality synthetic suede that is very smooth & will not irritate the skin like other holsters. King Holsters are by far the best bet for maximum concealed, comfortable carry. Listed below are examples of guns that will fit this model holster. Please note this list is not intended to be all inclusive. More guns will fit this holster.