JNBY x Central Saint Martins(test)

Sustainable Raw Materials – Spiber Brewed Protein

Softer on the body. Lighter on the earth.

Softness Meets Strength

It combines the softness and warmth of cashmere with the strength of silk-like fibers — bringing together comfort and durability in one material.

Soft
Warm
Strong
Durable

Environmental Impact

79%

Less CO₂ emissions vs. conventional cashmere

97%

Less water consumption vs. conventional wool

99%

Reduction in land use vs. animal-derived fiber

Introducing Brewed Protein™

For JNBY, the integration of Brewed Protein™ represents more than a material innovation. It reflects an ongoing commitment to exploring alternative pathways for fashion—where creativity, technology, and sustainability work together to shape the future of clothing. Through this collaboration, we continue to investigate how advanced materials can enrich everyday experiences while contributing to a more thoughtful relationship between people, products, and the planet.

What is Brewed Protein

Brewed Protein™ is a next-generation fiber, created by analyzing natural protein structures and transforming plant-based sugars into high-performance fibers through fermentation. This process eliminates the need for petrochemical materials, making it cleaner, more efficient, and more sustainable.

HOW IT'S MADE

Step 01

Research

Analyze the genetic composition of various natural protein materials.

Step 02

DNA gene programming

Designing DNA at the molecular level to embed genetically programmed DNA into microorganisms.

Step 03

Fermentation

Microorganisms ferment Brewed Protein™ polymers using sugars and other nutrients as nutrients.

Step 04

Purification process

Extract the Brewed Protein™ polymer and dry it into powder.

Step 05

Fiber synthesis

Spinning Brewed Protein™ polymer
solution into fipers.

Designed with Brewed Protein™

As the first women's designer brand in China to collaborate with Spiber, JNBY blends Brewed Protein™ with ultra-fine 17.5-micron wool to create this season’s signature piece: the ESG Collarless Wool Blend Coat — where comfort meets a more sustainable future.