Water repellentsDurable Water Repellents, DWRs, is a treatment that repels water and creates a water repellent surface – or hydrophobic surface to use the scientific term. On breathable/waterproof garments, the water repellent prevents the face fabric from becoming saturated with water and impeding breathability of the garment. All DWRs will become less effective over time, because of wear, washing or sun, therefore it's wise to re-proof the garment with wash-in or spray-on DWRs at home.
Fluorocarbons are commonly used in DWRs and are effective when it comes to water, dirt and grease repellency – but also an endocrine disruptor and can cause reproductive harm to mammals. Klättermusen has worked since 2004 to find alternatives to the standards of today, and was the first outdoor company to completely remove PFOA from all waterproof/breathable garments in 2008. We still use C6 technology in a few products where we have yet to find a substitute, but will phase out all fluorocarbons from both our supply chain and products until September 2017.