I'm surprised nobody has brought up the best pocket holster, in my opinion.
The Desantis Nemesis, available for a bunch of different pocket pistols. They work GREAT!
The Nemesis works great for my Seecamp, and now I have the Super Fly. I wore-out a custom leather holster that I had made for the Seecamp many years ago. For my P938 I have the Nemesis, but I had to cut the top edge because of the night sights. The sights would catch on the stitching and trim. This slight modification and it works perfect.
I am planning to order a custom leather pocket holster for the Sig. Some gun just deserve a leather leather rig.