Universal Plus products are chemically inert and green in color (the universal symbol for safety) to indicate that they're intended for use with hazardous materials. Surfactant-treated, brightly colored absorbent picks up a wide range of aggressive chemicals while remaining chemically inert. Medium weight - optimal for most general maintenance needs. Universal Plus products feature 3-ply construction increasing durability while reducing lint. Non-perforated absorbents offer the greatest absorbency and better tear resistance in high traffic areas.