The book“Functional coatings” discusses coatings designed for specific purposes such as anti-fouling, anti-ice, easy-to-clean, and more. Significance for organic coatings and functional textilesThe combination of bismuth oxide nanoparticles and water-based polyurethane opens up new possibilities for organic coatings with functional added value. They are particularly relevant for wearable protective textiles that combine high wearing comfort with effective radiation shielding. Water-based coating systems such as this also offer ecological advantages over solvent-based alternatives. This development shows the potential of functional coatings to minimise health risks while promoting sustainable materials.