Folds over the ball? Why, that doesn't make the bore to patch ball any tighter. You only have like a 1/16" to 1/8"+- contact along the contact equator of the patch/ball.
Looks different , like a square patch I've used in the past.
If it sells go for it!
At the range I lube with water soluble cutting /cooling fluid, distilled water and cutting fluid concentrate with nothing else added in.
Hunting is a grease patch of what ever I have opened, which most of the time is several tubes or cans of bacon grease looking stuff. I even have some bear grease.