Found a tear in a partsplus filter once. The filter media disintegrated in my hands as well and the drain back valve wasn't sealing at all. I'd pay more for a decent filter.
Parts Plus are relabeled Premium Guard filters.The ones I have seen on here cut open are very well made.A vry popular jobber filter amongst oil change places where there is a Parts Plus store in town.Previous Parts Plus suppler was Champ Labs and they went to E core,before the PG changeover...years ago.
They're Chinese filters, like Premium Guard, Rural King, etc. with the plastic shrink wrap over the end to help keep from rusting during (ocean container ship) transport. Not known for their efficiency, but at least have a thick, heavy can.