PS: Off body carry is very, very rarely practical and useful...if ever.
Sometimes it is necessary. Examples abound.
Going to the doctor's office where you will be disrobing*. Easier to have your weapon and wallets and keys off your body.
*They always weigh me, even if my clothes are staying on, and that's a sufficient reason to not have my gun on me; I have enough pounds without adding weight. So EVERYTHING will be in a carry bag of some kind.
My favorite, going to the chiropractor, because a belt gun or a pocket gun will certainly interfere with the adjustment process.
Side note - I told this story before. About six months ago I went to my orthopedic doctor to discuss my knees. SURPRISE!!! They wanted x-rays. Okay, fine, I rolled up my pants' legs and let them take pictures. Afterwards, the x-ray technician comes out and says to me, ".38?". LOL!!! The x-ray took a lot more than just my knees!!!
I had two sling bags for the purpose under discussion. I decided I didn't like them for gun carrying so I gave them to my grandsons. I really dislike off body gun carrying so I only do it under special circumstances, which used to include walking and running but see above in re knees.

I used a fanny pack during such activities.
I use various messenger bags or similar and when I do my friends always presume that's where my gun is (yes yes, they all know, plenty of them are gun folks, anyway). They are always wrong.
