Built to be worn: how WAZP rethought 3D printed footwear
When 3D printing stops being the point and starts being the solution
Most people never stop to think twice about how their everyday products are made. The chair you are sitting on, the phone in your hand. Hardly anyone cares whether a table was produced using injection molding, CNC machining, or by hand. What matters is whether it works, whether it looks good, and whether it feels right in your hand. So why, when it comes to footwear, does 3D printing suddenly enter the conversation and the manufacturing method become the headline?
That question is exactly what gave rise to the METIS project, created by WAZP. But what exactly is this project? At the beginning, METIS was simply a problem, one that WAZP decided to confront. Like many other companies, they dreamed of creating a shoe that customers would like, that could be produced in the most sustainable way possible, and that would be easy to recycle.
The product was designed with real people in mind. People who want to wear everyday shoes that are stylish, not museum pieces. WAZP ditched the bulky, futuristic shapes typically associated with 3D printing and replaced them with clean lines, a modern aesthetic, and innovation you can’t see.
Designed around the foot, not the other way around
Most shoes on the market are designed with aesthetics in mind, not the natural anatomy of the human foot. The METIS team chose a different path, focusing on precise measurements and geometry tailored to each user’s unique parameters. The result is a wide, anatomical fit that respects natural movement.
Creating a zero-waste product meant reducing the need for gluing parts together and minimizing machine-generated waste. The answer seemed obvious: build the shoe as a single piece. Problems surfaced quickly, though. A one-piece product would require accepting major structural, commercial, and quality compromises. Interesting patterns and colors would be difficult to achieve, and the overall look would remain raw and unfinished. Not to mention the challenges of shifting seasons and changing trends.
Lower market interest was another risk. A fully 3D-printed shoe is a fascinating concept, but it wouldn’t become anyone’s first necessity. Even the most sustainability-conscious consumers would consistently reach for familiar silhouettes over unknown ones, regardless of the environmental benefits.
On the technical side, production time was a serious concern. Printing a single complete shoe can take between 12 and 18 hours per pair. A late-stage failure would mean losing the entire unit, generating between 150 and 250 grams of material waste per incident.
Two options, hard decision
WAZP explored hybrid construction methods, combining 3D-printed components with traditional footwear elements. 3D-printed outsoles would be assembled with conventional knit uppers. The benefits were clear: a more familiar aesthetic, greater design flexibility, and improved durability. The downsides were just as clear. Assembly would still rely on standard methods, limiting the ability to accommodate non-standard sizing. Repairability would be minimal, and recycling would remain complicated due to material bonding and chemical adhesives.
WAZP faced a choice. Option one meant sticking with traditional footwear: high market acceptance, but a heavy carbon footprint estimated at 12–14 kg CO2e per pair, complex global supply chains, and poor recyclability. Option two meant going fully 3D-printed: strong production advantages, but weak market adoption, limited design freedom, and high production risk.
After weighing both options, the team made a decision. They looked at them and rejected both. The question became: why use 3D printing to print the entire shoe, when it could instead solve the most complex part of the whole process — assembly? They got to work immediately.
Rather than printing the product as one piece, they focused on applying 3D printing where it mattered most: precision, repeatability, local on-demand production, and tool-free customization.
EasyStitch© – where tradition meets innovation
METIS introduced EasyStitch©, a simple modular stitched construction made possible by 3D-printed components that guide and simplify assembly, while preserving the durability and performance of traditional footwear. The solution completely eliminated the need for casting, cementing, heavy industrial machinery, and years of specialized training.
That process brought the METIS project to life. The EasyStitch© system, inspired by traditional cobbler stitching but redesigned for modern production, allows anyone with basic sewing knowledge to assemble a shoe anywhere, with minimal tools and no glues or chemicals.
