Walt wall cover is a paper-backed version of the thick wool felt – Walt. Thanks to this stabilising backing, it can be used as wallpaper. Its thickness (3-4 mm) makes it an excellent sound absorber. The acoustic properties are confirmed with a certificate. Paper-backed Walt is a proposal for designers to be used in creative solutions, especially desirable in unique interiors and facilities. The natural flame retardancy of wool makes Walt suitable for use in public spaces.