As a pioneer in eyewear design, Hoet Design Studio is constantly challenged to design solutions that create a better equilibrium between aesthetics, functionality, technology and economics. For their Cabrio collection, they ran into design constraints that conventional technologies weren’t able to solve. Therefore Bieke Hoet turned to Materialise to explore the possibilities of using 3D Printing to overcome these limitations.

Enhancing Functionality in Small Spaces

The challenge in producing its latest line of sunglasses was to combine functionality and esthetics in extremely small geometries and with tight tolerances. That’s why Hoet designers contacted Materialise engineers to get involved. Tackling first the issue of functionality, the initial project was to design the connection between the frame’s temple arms and its lenses. After much collaboration, a new snap fit was designed to clip the arms directly to the lenses.

 “When designing eyewear you’re working in small spaces so it’s always a challenge to create lightweight components that are strong and functional,” says Bieke Hoet, Founder of Hoet Design Studio. Thanks to the huge degree of design freedom in 3D Printing eyewear, Materialise designed clips which can be easily opened and closed, thereby performing better than their injection molded predecessors.

After testing the first 3D-printed prototypes of the clips and seeing how well it worked, Hoet Design Studio was convinced it had chosen the right manufacturing path. Building further on the concept, they started designing eyecatchers, accessories that can be fitted onto the clips to achieve different looks.

Design Freedom: From Paper to Production

Once solving the problem of functionality, the team turned their attention to enhancing the aesthetics.


“Since 3D Printing offers a great deal of flexibility to create unusual and intricate shapes, we had the freedom to design what we drew on paper, without modifying it in production. That’s why the design started from lines rather than surfaces.  The result is a curved open structure that no other technology would have been able to produce,” explains Bieke.



The result of the cooperation between Materialise and Hoet Design Studio is the Cabriolet Evo B, a pair of sunglasses that offers users a close and comfortable fit with a distinct, cutting-edge shape. In fact, when it was presented to an international group of distributors in March, the collection was very well received.

 “3D Printing has allowed us to achieve our designs extremely quickly. Rather than going through the many steps required in traditional manufacturing, we can immediately print shapes we have designed on paper; this has cut our process for research,” adds Bieke. “Now that we know the design possibilities of Additive Manufacturing, ideas for following projects in 3D Printing are already on our drawing table.”


Find out all about the Cabrio collection.

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