Nikwax Rug Wash Safely cleans horse rugs and blankets without damaging water repellent finishes Doubles the life of Nikwax waterproofing treatments and revitilizes insulation Easy wash-in application; Machine wash safe Recommended for all synthetic, canvas, cotton, lined, or unlined horse rugs and blankets; Ideal for Gore-tex and Rambo Water based, biodegradeable, and contains no PFCs or VOCs