Special lightweight, absorbent fabric soaks up petro chemicals but does not absorb water. Each pad absorbs 20 to 30 times its weight. Great for bilge areas and engine rooms.. Quickly absorbs oil and fuel, but will not absorb water. Made of high-quality, virgin materials; will not unravel Can be wrung out and re-used. Ideal for wrapping fuel nozzle to prevent refueling spills