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Boot & Fabric Care: Fabric Care
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Nikwax Downproof Fabric Care (10 fl.oz) Nikwax: Downproof Fabric Care (10 fl.oz)

Reduces absorbency of down.
DownProof wash-in treatment reduces the water-absorbency of down and adds water-repellency to the fabric's outer shell. It makes down less susceptible to humidity helps it dry faster and increases the effectiveness of the insulation in damp conditions by helping the down maintain maximum loft. DownProof may reduce breathability of coated or laminated breathable waterproof fabrics. Sleeping bags should be treated in large capacity commercial front loading machines. DO NOT USE A TOP LOADING MACHINE.

Great waterproofing product for down and fabric Image: 4 Stars
by Anonymous
We use as directed with every other laundering ...

Great for peace of mind! Image: 5 Stars
by Anonymous
I used it on my down bag before my winter camping experience in Yosemite. One of those nights was exceptionally cold and the condensation from the tent created a nice big damp spot on top of my bag but down was water resistant enough to retain the loft required to keep me comfortable all night long. I do not think I would have been nearly as comfortable had I not used this downproof solution. I remember being surprised at how quickly my order arrived and at how professionally it was packaged will definitely shop here again.