Paper with polyethylene backers. Absorbs 1,050ml/sq. meter. With a skid-resistant, waterproof, chemical-resistant polyethylene backing the makes spill containment easy. Thousands of Thirsty Cells quickly absorb spills and cushion breakable labware. Sized for benchtop, floor, and fume hood. Use as a tray, drawer or shelf liner or to wipe up spills. Includes durable cloth-like top layer that won't fall apart when wet " can be used as a floor soaker.