Techniques that make fabric water repellent today almost is based on fluorocarbons, also known as per- and polyfluorinated compounds (PFCs). These are substances that do not degrade in nature or take a very long time to do so. Instead they tend to accumulate in the environment and human body and spread long distances from their production and usage sites.
The “fatty” polymers are bound to the textile fibers through the organocatalysis, creating 3D-network of water repellent molecules around the fibers. The chemistry used is readily biodegradable according to the test OECD 301C and non-reacted chemistry released during production or during use of the fabric.