For her 2015 Magnetic motion collection van Herpen collaborated with artist Jolan van der Wiel on a series of accessories, including shoes, belts, necklaces and clutches, that were ‘grown’ using magnetic fields. Like van Herpen, van der Wiel is interested in collapsing the boundary between nature and technology. This work was created using a composite material of pigments, resin and iron filings layered over a shoe base and subjected to the force of strong magnets. As the filings reached outwards, the surface transformed into a spiky, textured and flexible skin before being manipulated by hand into the final shape.