Last spring/summer I started carrying my 642 in an Alessi iwb holster. Things went along fine for awhile. I liked carrying it appendix. I would wear it on my walks with a tee shirt hanging over it. Late in the summer I developed a rash that required a non itch lotion to clear up. This spring I have worn it one time and the rash came back.

What gives? I don't think it is the holster as this one appears to ride below the rash. I think it may be the friction of the grips, Spegel cocobolo, or maybe the finish?

Anyone have any thoughts. I hate the idea of wearing two tees, one in one out.