The UniLeg: Innovation in Every Step

At Limber, we’ve reimagined a new kind of transtibial prosthesis that is lightweight, durable, and accessible. The UniLeg is the world’s first fully 3D-printed, water-resistant transtibial prosthetic leg. Designed for simplicity, performance, and rapid clinical delivery, it combines advanced engineering with a fully digital workflow to empower clinicians and patients alike. Limber’s innovation doesn’t stop there. We are proud to introduce an exciting new feature that pushes the boundaries of where the UniLeg can take you – the New Molded Tread option.

Molded Tread: Designed for Barefoot Movement

We’re excited to announce Molded Tread, a new optional feature for the UniLeg that enhances grip, comfort, and real-world versatility for below-knee amputees, especially in barefoot and rugged environments. Limber’s Molded Tread feature is a high-durability outsole that is integrated directly into the UniLeg using a strong, flexible rubber compound, allowing for confident movement on slippery, uneven, or irregular surfaces without the need for shoes or additional accessories. No more draining water. No more compromised traction. No more choosing between performance and simplicity.

Cara Negri, Lead Prosthetist at Gainesville Prosthetics holding the UniLeg with Molded Tread

Until now, navigating trails, beaches, wet decks, or damp floors often required drilling drainage holes in foot shells or switching gear altogether. The Molded Tread feature eliminates those obstacles by delivering an adventure-ready prosthesis with integrated performance that works as hard as you do.

Whether you’re walking through grass, exploring the shoreline, or jumping into a kayak, the New Molded Tread option provides:

  • Reliable traction across diverse terrain
  • Natural barefoot heel height with added protection
  • Drainage-free design for wet environments
  • No tools or modifications needed

This is comfort and capability, engineered into every step.

Go Anywhere. Do Anything.

The new Molded Tread feature reinforces Limber’s core philosophy of empowering amputees to move through life freely and confidently. This performance upgrade helps extend the UniLeg’s capabilities beyond sneakers, sidewalks and indoor surfaces—supporting active lifestyles, spontaneous adventures, and barefoot freedom.
Whether you’re an athlete, weekend explorer, or simply someone who enjoys going shoeless, this feature delivers enhanced mobility without added complexity.

Available Now

Ask your prosthetist about upgrading to a UniLeg with Molded Tread.