Demystifying DWR on Rain Jackets: How Does it Work?
Waterproof/breathable rain jackets are coated with a polymer called DWR (Durable Water Repellency), which causes rain to roll off the jacket’s outer surface. Many, but not all, DWR coatings are based on fluoropolymers, which have a fluorine atom at one end that is highly hydrophobic. Water is repelled by the fluorine atoms, resulting in beading, … Read more