High-performance textiles for real-world applications

SeiFibre™: a silk-like staple fiber made from marine biomass - Algae

A close-up of a SeiFibre™ staple fiber

  • Excellent tensile strength & elongation
    Comparable to premium cellulose fibers.

    Natural moisture management
    Antimicrobial, skin-friendly & breathable

    Natural appearance
    White to yellow color.

    Biodegradable & ocean-safe
    Designed to break down in controlled conditions.

  • Dtex Range
    - 1,2-2 dtex: delicate, silk-like fabrics

    Staple Length (38-65 cm)
    - 38 mm: open-end (rotor) spinning
    - 65 mm: ring&air - jet spinning

    Micronage
    12 micron

    Liquid absorbent
    >8 times of itself

Available for purchase from ER Ocean Recherche only
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Fiber sliver / top

Available in standard bumps and bobbins. Well suited for blending with naturally long fibers

SeiFibre™ marine biomass fiber sample close-up 
Available for purchase from ER Ocean Recherche only
Contact us

SeiYarn™ cones, with different blends possible

  • 30% SeiFibre™, 70% cotton; 30S
  • 30% SeiFibre™, 70% Giza cotton; 30S
  • 30% SeiFibre™, 70% Supima cotton; 30S
  • 30% SeiFibre™, 70% Lyocell; 30S
Close-up of a SeiYarn cone presented under a soft light. 
Available for purchase from ER Ocean Recherche and affiliated partners
Contact us

Ocean fabrics & yarns by Sei™

  • Close-up of white SeiYarn fabric

    Ocean silk

    38% silk, 62% SeiYarn™

  • SeiYarn woven fabric texture beige

    Knitwear

    80% long staple cotton, 20% SeiFibre™

  • SeiYarn sustainable textile blend fabric

    Woven fabrics

    100% SeiYarn™

  • SeiYarn herringbone woven pattern fabric

    SeiYarn™

    70% Lyocell, 30% SeiFibre™

  • SeiShell coated-canvas structure demonstration

    Coated canvas - SeiShell™

    Organic textile base, coating layer made with marine biomass

Featured partner: Les Tissages Perrin, France
Close-up of a SeiYarn cone.

SeiYarn™

SeiYarn close-up herringbone pattern 
  • Yarn count: 30S/50NM/1
  • Composition: 30% SeiFibre™, 70% Lyocell
  • Tech: ring spun
  • Other blends and yarn types available

Enhancing every blend with a naturally silky finish

SeiYarn ocean silk luxury fabric

Ocean silk

SeiYarn cotton blend knit fabric 
  • Composition: 62% SeiYarn™, 38% silk
  • Maximum width: 140 cm
  • Made in: France

The essence of the ocean flowing through waves of silk

SeiYarn invasive algae wowen fabric texture

Knitwear

SeiYarn knit fabric construction detail 
  • Composition: 20% SeiFibre™, 80% long staple cotton
  • Yarn: ecru yarn Ne 30/1 Compact
  • Made in: Portugal

A skin-friendly solution with excellent tensile strength: 21 RKM

SeiYarn textured costume fabric drape detail

Woven fabrics

Close-up of textured white fabric or paper with a repeating pattern. 
  • Composition: 100% SeiYarn™
  • Tech: different waving techniques available
  • Made in: France

Fresh and long-lasting, for everyday comfort

SeiShell plastic free leather alternative drape

SeiShell™

white SeiShell bio-based leather texture
SeiShell plastic-free leather texture
SeiShell coated-canvas alternative leather texture 
  • Bally flex: >20.000 flex cycles
  • Composition: organic textile base, coating layer made with marine biomass
  • Tech: roll-to-roll
  • Made in: France

Three different grains available, very resistant

More blends and colors available

Request our product presentation

Material in use

Our textiles are designed for a wide range of end uses. Depending on their construction and finishing, they are well suited for knitwear, tailored garments, shirts, trousers, and bed linen, among other applications. This flexibility allows the same fiber base to adapt to different performance and aesthetic requirements, from everyday comfort to more structured, refined pieces.

Haute couture dress made with SeiFibre and SeiShell
Close-up of a white cotton boll with fibers.

Staple fiber and sliver / top

Close-up of a peeled banana. 
Available for purchase from ER Ocean Recherche only
A close-up of cylindrical, metallic, textured object on a white surface.

Yarn

Available for purchase from ER Ocean Recherche and affiliated partners
SeiYarn natural woven fabric construction

Featured fabrics

SeiYarn silk blend luxury fabric drape 
Available for purchase from ER Ocean Recherche only
SeiYarn fabric production samples

Ongoing developments and customization

We continuously experiment with different weaving techniques, alongside new blends and material variations, to explore new textures, performances, and applications. This ongoing development approach allows us to tailor our textiles to specific functional or aesthetic requirements. If you have particular needs or a unique use case in mind, we encourage you to reach out — we are always open to developing customized solutions together.

Contact us

Frequently Asked Questions

General

  • The raw material is marine biomass, mostly consisting of algae. For more details on its composition we invite you to contact us to receive the technical sheets.

  • Custom solutions are possible and are evaluated on a case-by-case basis.

  • We are open to working with brands of all sizes and can begin with smaller batches.

  • The maximum width is 140 cm.

  • Technical specifications available upon request. Please, contact us at the dedicated page.

About SeiFibre™

  • SeiFibre™ is one of the materials in ER Ocean Recherche’s portfolio, a staple fiber made from marine biomass, mostly algae. SeiFibre™ is spun into yarn cones, then woven or knitted into fabrics.

  • Yes, SeiFibre™ is antibacterial.

  • SeiFibre™ can absorb up to eight times its own weight.

  • SeiFibre™ naturally appears white to light off-white.

  • Yes, our fabrics are currently produced through manufacturing partners in France, Portugal and Italy, selected based on their expertise and the specific technical requirements of the fabric.

About SeiYarn™

  • SeiYarn™ is one of the materials in ER Ocean Recherche’s portfolio, a yarn made of a significant portion of our fiber, SeiFibre™ (with the exact percentage varying according to the desired blend). As a result, SeiYarn™ also contains marine biomass. SeiYarn™ is then woven or knitted into fabrics.

  • Yes, our yarns are currently produced through spinning partners in Portugal, France and Italy, selected based on their expertise and the specific technical requirements of the fabric.

  • SeiYarn™ blends well with materials like silk, organic cotton, lyocell and modal. Some of the tested compositions include yarns with:
    - 30% SeiFibre™, 70% cotton; 30S
    - 30% SeiFibre™, 70% Giza cotton, 30S
    - 30% SeiFibre™, 70% Supima cotton; 30S
    - 30% SeiFibre™, 70% Lyocell; 30S
    And our favorite, a silk-like fabric with 62% this last yarn and 38% silk.
    Blends are customizable upon request.

  • Most SeiYarn™ cones are currently produced through compact ring spun and with a yarn number between 30S and 60S. We are continuously producing new versions, so we encourage you to contact us if you would prefer a different one.

About SeiShell™

  • SeiShell™ is one of the materials in ER Ocean Recherche’s portfolio, a coated canvas mimicking leather. SeiShell™ combines an organic textile base with a coating made from marine biomass.

  • SeiShell™ should be dusted regularly, and cleaned regularly using neutral soap and a soft brush. It is recommended to rinse with clean water, while avoiding excess water that could penetrate seams, and to remove perspiration marks regularly.

  • It is suggested to avoid prolonged exposure near a heat source. Additionally, the use of the following has to be avoided: alcohol, acetone, undiluted bleach, abrasive cleaning products, perchloroethylene, all types of waxes, and trichloroethylene. It is recommended to not leave sopa or cleaner residues on the surface. Do not steam clean and do not machine wash this coated canvas.

  • SeiShell™ appears naturally off-white.

  • White, black and blue. Contact us if you require a different color.

  • Three grains are available, each with a different size.

  • Yes, our coated canvas is currently produced through manufacturing partners in France and Portugal, selected based on their expertise and the specific technical requirements of the material.