Seamless Bonding Technology

We bond what others sew.

Most underwear is held together with thread, and every seam leaves a ridge you can feel and a line that shows. We use silicone, tape and laser-cut edges instead. None of it needs a needle.

  • OEKO-TEX® Standard 100 Fabric and tape, independently certified.
  • Up to 600% stretch In the silicone bond, before it breaks.
  • Silicone that doesn't perish Unlike rubber, it keeps its stretch.
Illustration: a nozzle lays lines of clear liquid silicone onto fabric along the shape of a cup
01 Silicone bonding For shape and support.
Illustration: clear bonding tape fed onto fabric by a taping machine
02 Tape bonding For seams that stretch.
Illustration: a laser head cutting a garment pattern out of a sheet of fabric
03 Laser-cut fabric For edges without a hem.

Photos illustrate the techniques.

What a seam leaves behind

A seam stacks thread and folded fabric into a ridge you can feel. A bond keeps the layers flat.

Stitched seam

Thread through every layer, allowance folded on top.

Tape bonded

A thin elastic tape fused between the layers by heat and pressure.

Silicone bonded

A single line of silicone, sealed between two layers of fabric.

Schematic cross-sections, not to scale.

Illustration, detail: clear liquid silicone leaving the nozzle and following the lines of a cup
01

Silicone bonding

Drawn flat, then shaped.

Liquid silicone is applied in a single layer along the lines that shape the garment, then sealed under a second layer of fabric. Moulding comes last. The faint lines you see are the support.

Illustration, detail: clear bonding tape running along a fabric edge under a pressure wheel
02

Tape bonding

Italian tape, fused with heat.

Seams and edges are joined with a clear Italian tape: an elastic core between two adhesive faces, fused into the fabric with heat and pressure. Light, solvent-free, and made to spring back to its shape.

Illustration, detail: a laser head cutting along a curved line in the fabric
03

Laser-cut fabric

An edge no thicker than the fabric.

A laser cuts the fabric and seals the fibres at the edge in the same pass. The edge does not fray, so it needs no hem and stays a single layer.

Hemmed edge

Folded twice and stitched: three layers and a line of thread.

Laser-cut edge

Cut and sealed in one step: a single layer.

Durable & certified

Silicone keeps its grip and its stretch over time, where rubber dries out and perishes. The tape springs back when released, and a laser-cut edge has nothing to fray. The fabric and the tape are independently certified to OEKO-TEX® STANDARD 100.

  • Fabric 145% Maximum stretch, and it comes back.
  • Tape 400% Maximum stretch of the tape.
  • Silicone 600% Maximum stretch before it breaks.
Certified
  • OEKO-TEX® Standard 100 Fabric and tape, tested for harmful substances.
  • REACH Annex XVII The tape meets EU limits on hazardous substances.
  • Solvent-free The tape is made without solvents.
  • Skin-safe silicone And sealed inside the fabric as well.

FAQ

Is there a difference between rubber and silicone?

Yes, and it shows over time. Rubber dries out, cracks and slowly loses its stretch, which is why old elastic goes slack. Silicone does not perish that way, so a silicone bond keeps its grip. Care tips are on Our Fabric.

Why can I see faint lines?

Those are the silicone lines showing through the fabric. They give support where a seam usually would, without the ridge.

Does the silicone touch my skin, and is it safe?

It is sealed between two layers of fabric, so what touches you is fabric. The silicone itself is skin-safe, and the fabric and tape are certified to OEKO-TEX® STANDARD 100.

Continue reading What our underwear is made of Bonding is only half of it. The other half is the fabric: an Italian microfibre, thin enough to disappear under clothes and made to keep its shape. Read about our fabric

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