Gjertrud Hals focuses on natural fibers that she transforms through various techniques including weaving, knitting, casting, spraying and cutting. Hals’ works have been acquired by private and public collections, such as the Centre Pompidou, Paris, France; National Museum of Contemporary Art, Oslo, Norway; The Museum of Contemporary Crafts, New York, USA; The Museum of Decorative Arts, Lausanne, Switzerland; Mobilier National / Les Gobelins, Paris, France and the Bellerive Museum, Zürich, Switzerland.