As someone born in Belgium, I couldn't help but smile when I came across this story. It's one of those simple but brilliant ideas that reminds me why innovation and sustainability can go hand in hand. So for this Feel-Good Friday, we're heading to my little corner of the world for a story that turns waste into something unexpectedly wonderful.

Every year, more than 300 million tennis balls end up in landfill around the world. While they may seem small, these fuzzy yellow sports staples are surprisingly difficult to recycle, with many taking hundreds of years to break down once discarded.

Thankfully, one Belgian designer is proving that even the most unexpected waste can be transformed into something useful, beautiful, and impactful.

Turning Waste Into Quiet Innovation

Brussels-based bio and eco-designer Mathilde Wittock, founder of MWO Design, works at the intersection of sustainability, material science, and sensory design. Her mission is simple: create innovative materials from local and waste-based resources while keeping circularity at the heart of every design decision. 

One of her most exciting creations is Soundbounce, an acoustic material made from discarded tennis balls. Designed to help soundproof interior spaces, the material can be used in wall panelling, furniture, acoustic partitions, and custom installations. It's a solution that's serving up sustainability in more ways than one!

Giving Tennis Balls A Second Life

The idea was inspired by a growing waste problem. Every year, more than 300 million tennis balls are discarded globally, with most ending up in landfill. As an avid tennis player herself, Wittock saw an opportunity to rethink what happens after a ball reaches the end of its sporting life.

Each tennis ball is carefully hand-cut, cleaned, and dyed using non-toxic or ecological pigments before being incorporated into a modular system. Rather than relying on glue or adhesives, the balls are slotted into specially designed structures that can later be disassembled and reused. This circular approach means the materials can continue their journey long after their first transformation.

More Than Just Recycling

What makes Soundbounce particularly impressive is that it's not only diverting waste from landfill. It's also helping address another modern challenge: noise pollution.

Wittock's work explores how sound affects our wellbeing and how design can engage more than just our sense of sight. Her research focuses on creating sensory-rich environments that help people feel more connected to the spaces around them. 

Soundbounce reportedly absorbs up to 97% of sound at key frequencies, helping create quieter and more comfortable indoor environments. Each square metre of Soundbounce uses approximately 283 tennis balls and upcycles the equivalent of 8.5 kilograms of CO2. That's a pretty ace outcome for something once destined for landfill. (last pun, promise hahaha)

    

Designing For A Circular Future

Circularity sits at the centre of Wittock's work. The tennis balls can be removed from finished products, and owners can even return furniture pieces at the end of their life so materials can be processed and repurposed again. Her vision extends beyond Belgium too. Wittock hopes the concept can be adopted elsewhere, helping communities around the world find new ways to transform local waste into practical solutions. Love!

For more feel good stories, you can pick from so many others here.

Until next time GFZ's,  Ellie xo