I pocket carry a J frame most of the time. I wouldn’t do it without a proper holster that covers the trigger guard and keeps the butt upright.
Here’s a photo of some that I’ve accumulated:
On the left is an old Pachmayr “T.A.C. Tactical” pocket gizmo. It replaces the grips, carries extra ammo and keeps the butt upright. Interesting idea, but it doesn’t cover the trigger guard, is hard on pockets, eliminates grip choices and smacks you on the knuckle when shooting. I’m also not sure how the ATF views these.
Next column has (3) Kramers and an Alessi. The middle Kramer shows the outside. The outside of the Alessi is also flat and looks like a wallet in your pocket. They’re both excellent choices. I picked up the extra Kramers used as spares, but I doubt you could wear one out in a lifetime.
Top of the next column is an old Ahern pocket natural. I used one for about 10 years, but switched to a Kramer. The gun was able to move too much inside the holster, which caused excessive wear on the finish. It also soaked up perspiration and destroyed some pockets.
Below that is a Milt Sparks holding my 342Ti, which is my current favorite. It’s very comfortable and is almost perfect! I bought it second hand and believe it’s sharkskin. Some slacks don’t have pockets wide enough to accommodate it, so in those cases I use a Kramer.
On the far right is a PC 327 (N frame) in a Mika. It makes for great winter coat pocket carry. He makes a quality product at a very reasonable price. You can get them with either a round or square bottom, depending on the type of pocket you have. They’re extremely durable and Bob is great guy to deal with. I had several J frame Mika’s, but gave them to a friend who wanted a pocket holster for himself and his son.