The news

A chamois with the foam designed out of it

Elastic Interface has been making the squishy pad inside cycling shorts for a long time — the Italian company, founded in 2000, invented the elastic chamois and now supplies pads to apparel brands in more than 40 countries. Its newest piece, the Aura N3X FL, is the one it calls its first genuinely foam-free seat pad.

Shown at Performance Days in Munich, the FL drops the polyurethane foam that sits at the core of a normal chamois and rebuilds the pad out of 3D-printed inserts and engineered textiles instead. It's patent-pending in Italy, and — this is the part worth holding onto — it's sold as a component to clothing brands, not as finished shorts. You won't buy an Aura. You'll buy someone's bib shorts and find one inside.

The framing from All3DP, who picked up the launch, is the right one: 3D-printed bike saddles already went mainstream, so printed padding was only ever a matter of time. The saddle was the obvious target. The pad pressed against it is the quieter, more intimate one.

Why foam was the ceiling

One material, one density, one compromise

A molded or extruded foam pad has a built-in limitation: it's essentially one material at one density. You can vary how thick it is, but you can't really make it firm in one spot and soft a few millimeters away. Every rider's sit bones, soft tissue, and pedaling motion get the same uniform squish — a single compromise stretched across a very non-uniform anatomy.

Foam also ages badly. The cell structure packs down and collapses over time, so the pad that felt right out of the box slowly flattens into something that doesn't. And conventional foam tends to trap heat and soak up sweat, which on a long ride is exactly the wrong behavior. Most of Elastic Interface's existing pads, for what it's worth, are extruded polyurethane — so this is the company picking a fight with its own back catalogue.

How the lattice works

Print the structure, tune it by the millimeter

The trick is the N3X platform underneath the FL. When Elastic Interface debuted N3X at Eurobike 2022 — billed as the world's first 3D-printed chamois — it replaced foam with an open lattice: a honeycomb-style cell structure engineered to compress along a diagonal plane rather than just squashing flat. Because the lattice is printed, the company can dial density zone by zone: firmer cells under the sit bones, softer and more open cells through the central channel, with claimed millimeter-level control over where the support sits.

That open structure does two more things foam struggles with. Air moves through it, and the material is hydrophobic — it sheds sweat instead of absorbing it. The diagram up top maps the idea: violet where the load concentrates, teal where the structure opens up to breathe.

What "FL" actually adds

The Aura N3X FL pushes the concept to its conclusion by removing not just the foam but the laminating adhesives too. Elastic Interface describes it as an integrated stack: the N3X printed inserts for modular, variable-geometry support; an Eco AirTech 3D fabric for breathability and fast drying; a Topper transition layer that softens skin contact and is meant to erase pressure points; and an Eco Matrix base that stabilizes airflow and the pad's microclimate. With no glue layers between them, the company says construction gets simpler and the pad responds more naturally to pedaling motion. It's manufactured in Italy on a purpose-built printer, and EI is clear that it complements its foam range rather than replacing it.

A reasonable note of caution: the comfort, breathability, and durability figures here are Elastic Interface's own claims, and independent long-haul reviews of the FL are still thin on the ground. The engineering logic is sound; the marketing superlatives deserve the usual squint.

The bigger shift

Printed lattices are coming for everything molded foam used to do

Zoom out and the chamois is one data point in a clear pattern: wherever comfort meets pressure, a tuned printed lattice is starting to replace a block of molded foam. Saddles were first — 3D-printed lattice saddles from the major saddle makers went from curiosity to normal in a few short seasons. The pad pressed against the saddle is just the logical next surface.

Footwear is on the same trajectory. We wrote about Creality's KliTek and its multi-hardness TPU demo, where a shoe gets printed as one object with the sole, upper, and insole each laid down at a different durometer. That's the identical idea as the chamois: a single printed part carrying many tuned zones, instead of an assembly of separately molded pieces glued together.

And the design tools are racing to meet it. The organic, lattice-filled, density-graded geometry that only additive manufacturing can produce is exactly what generative and AI-driven design software keeps spitting out — a thread we picked up in our piece on PhysicsX and physics-aware AI design. The shapes are getting easier to generate. The pad is proof they're getting easier to make, too.

Print it yourself?

Can a home printer do this? Honestly — the principle, yes; the product, no

Let's be straight about the gap. The Aura N3X FL runs on a purpose-built industrial printer, a proprietary bio-based elastomer, and a patent. You are not cloning it on a Bambu in the garage, and anyone who tells you otherwise is selling something.

The principle, though, is genuinely within reach of consumer gear. Flexible TPU on FDM and flexible resin both let you print zone-tuned lattices — grips, shims, vibration pads, ergonomic test cushions, saddle and seat prototypes, orthotic-style inserts. If you've read our 2026 filament guide, you know TPU wants a direct-drive extruder and patient print speeds, and that softer shore hardnesses behave more like dense foam. Pair a printed lattice with a 3D scan of the actual contact surface and you can iterate fit fast and cheap.

Foam vs. printed lattice

Where the two approaches actually differ

The San Diego angle

Local cyclists, local prints

San Diego is a serious riding town — coast routes, canyon climbs, year-round saddle time. That's a lot of contact-point comfort problems, and a lot of them are exactly the kind of thing a printed lattice prototype is good at exploring.

At Dreaming3D we run FDM on a Bambu Lab A1 and Creality CR-10S, high-detail resin on an Elegoo Saturn 4 Ultra 16K, and a Revopoint MetroY scanner. So we can scan a real contact surface and print custom TPU or flexible-resin lattice prototypes, comfort accessories, grips, and ergonomic test parts — locally, in a day or two, no industrial chamois line required. We also handle 3D printer repair (including mobile on-site service across the county), custom PC builds, and one-on-one printing and modeling tutoring.