Net Bag Pillows or onion-sack pillows as they are sometimes known, are large sacks of tough outer coarse weave netting formed into a sack with a pull-tie cord.
The sack is then filled with long strips of polypropylene that repels water but absorbs oil-based spills.
The coarse weave allows fluid to penetrate deep into the centre of the Net Bag Pillow trapping the oil on the polypropylene strips but allowing water based fluids to escape.
