Siraya Tech Roamr TPU Air HR: The Filament That Could Finally Make 3D Printed Shoes wearable

Finally, Footwear-Ready TPU

For years, makers have tried to 3D print shoes. The problem? Most TPU filaments are either too stiff, too soft, or lack the rebound needed for actual cushioning. Siraya Tech new Roamr TPU Air HR changes that equation.

The filament uses active foaming technology to deliver what the company claims is a 48-50% rebound rate — significantly higher than standard TPU Air.

How It Works

The magic is in the micro-foaming action during printing. This creates a fine matte texture that hides layer lines and eliminates the cheap plastic shine of traditional TPU. Your prints look like finished manufactured products straight off the build plate.

The 80A variant targets midsoles and orthotics while the 85A variant is optimized for smoother feeding across various direct-drive systems, including the entire Bambu Lab lineup (X1C, P1S, H2D, H2C).

Why This Matters

Previous TPU attempts at footwear felt like prototype plastic — rigid where they should flex, soft where they should support. Roamr bridges the gap between experimental materials and production-ready shoes.

If the rebound claims hold up in real-world testing, this could be the material that finally makes 3D printed footwear practical for everyday wear.

Availability

Roamr TPU Air HR is available now from Siraya Tech and Amazon in 800g spools.