Pure meltblown polypropylene fibers are the most cost-effective absorption technology today Fast-wicking fibers absorb up to 25 times their weight in hydrocarbon. These durable, medium-weight rolls absorb petroleum based liquids, but never water, ideal when you have to clean up oily spills or drips. Great for when you don't need the extra absorbency or expense of a universal absorbent. Product is sold by net weight.