A non-detergent soap specially formulated for the laundering of outdoor fabrics, as it does not interfere with the waterproof/breathable qualities of laminated fabrics, as conventional liquid detergents can. Also preps the fibers of whatever it is you’re washing to accept Granger’s Wash-In Waterproofer. Highly concentrated (up to 10 loads). Biodegradable. 10 oz.