Super huge chunky yarn

I’m trying to buy yarn for the way oversized blanket stitches that I’ve seen at several sites. My problem is when I review e the yarn it oulls apart badly. A blanket made if this would never hold up even with normal use. Could someone tell me exactly the name of that type yarn and where to buy it?

If it’s possible felting seems to be the key.

And it seems they will fuzz and fall apart somewhat over time.

Thank you!