Specialty waterproofer designed to protect the insulating properties of down-filled gear from wet and damp conditions. Easy to use in the washing machine or by hand, non flammable and PFAS free. For waterproofing down Easy to use wash-in waterproofing for all down clothing and sleeping bags. Adds water repellency and revitalizes insulation. Enhances the performance of your down gear, keeping you warmer and drier. Recommended for Nikwax Hydrophobic Down, Hydrodown™ and all other down clothing and sleeping bags. About: All Nikwax products are EASY to use and go exactly where needed; thus less product is wasted, saving you money. For those Nikwax products designed for clothing you can treat them in your washing machine, by hand or by using their spray-on products. The Nikwax range of products are SAFE to use. They are water based, contain NO propellant gases, are non-toxic, emit NO fluorocarbons and all are environmentally safe. By using Nikwax you can refresh and renew your gear thereby reducing the impact on the earth's resources. Nikwax products keep you DRY. Nikwax ensures you get maximum performance from your gear helping you to stay dry, warm and comfortable in wet weather. Enjoy your time in the outdoors (even if it is while at work!!)