Eco-Tec, a company that specializes in equipment for water purification, developed a filter fabric called Adsorb-It that can collect about 1.5 gallons of oil per square yard ("adsorb" meets collecting a substance on the surface vs. absorbing it). Adsorb-It is made from recycled fibers (primarily polyester) and, unlike the white polypropylene pads currently used in most booms, is completely reusable. Adsorb-It is best for removing smaller particles of oil from the surface of water, or "polishing the water," as Eco-Tec President Herb Pearse explained, while the company's SOS-28 fabric is most effective in removing large amounts of oil in plumes beneath the surface.