Nikwax Down Proof 10 oz.

My jacket was leaking at the shoulders after years of use, so I ran it through the washer with this treatment and it came out beading water like new. The machine-applied process took zero effort, and the 10 oz. bottle covered my long down coat with plenty left over for a throw blanket.

Tossed my old duvet in the washer with this instead of paying for dry cleaning, and it came out surprisingly dry and lofty. The fact that it's machine-applied makes it so much easier than spraying every panel by hand.

My sleeping bag came out fluffier than the day I bought it, and the fact that this works right in the washing machine meant I didn't have to hand-apply anything. Two loads done and the down still holds its loft perfectly after a wet weekend trip.