Thought I'd clue you in on a few tip to help keep them in place for
walking around, or keeping them where they belong in relation to your jeans when sliding them down to pee....
Try putting 1/2" to 1" wide elsatic on the inside of back upper area, it really does help, or sew in a channel and slide rope-type
elastic in with an adjuster to keep them snug.
I have a huge industrial leather sewing machine but
I do ALOT of sewing leather on the (household/simple)
Brother sewing machine from Walmart. Just put in a heavy-duty needle.
Hope this helps somewhat.