I have never had to wet mold any holster that I purchased. All I have done is wore the firearm in the holster while around the house. If its super tight you can put it in a plastic bag and leave the gun in the holster to stretch it out, but remember if you get the leather too stretched out there isn't much you can do to get it tight again. I'm sure some of the holster makers will chime in with some more info.