New seat foam WITHOUT fabric on edges - QUICK HELP PLEASE!!

I normally don't push for quick replies, but I WAS planning on doing my seats today, so if I can get some quick help, I'd appreciate it.

I searched online for some reupholstering videos. I came across a few Youtube videos from PUI. Here's one of them:


I see that their foam has some sort of a fabric material around all of the edges to help hog ring to the seat springs. It also looks like the guy has to cut the slits down the sides of the bottom. I went to their website to get a better look, and here is a pic from it:



I have no idea what brand mine are. They came with the car when I bought it over 5 years ago. My back piece has a different type of fabric around it, which is fine. But my bottom foam doesn't have that fabric on it at all, but it already has the slits:



Has anyone had any luck installing foam WITHOUT the material hanging off the edges (foam like mine)? If so, did you just hog ring the foam directly to the springs on the edges AND in the slits?

Thanks!!