The OWP Down Repel Wash-In Impregnation (300 ml) from Grangers is gentle and effective which is ideal for down-filled products. The purpose is to protect the down from moisture and extend the carrier as well as the insulation. It is important to say that before the treatment is done, the down must be cleaned. Granger's products now come in their 100% Post-Consumer Recycled (PCR) bottles that are made from Ocean Waste Plastic (OWP) which is why you are helping them make a difference.