GOTS Certified Silk | Certifications & Standards

CERTIFICATIONS

CERTIFIED AT EVERY STAGE

At HERTH, every material and every partner is held to internationally recognised standards. Certification is not a marketing tool — it is the evidence behind every claim we make. This page is where you can verify each one.

For our organic silk, we work exclusively with GOTS-certified suppliers — one of the most rigorous certifications in organic textile production, covering the entire supply chain from raw fibre to finished fabric.

GOTS — Global Organic Textile Standard

The leading international standard for organic fibres. GOTS certification covers the entire supply chain — from cultivation and processing to manufacturing and labelling — ensuring strict environmental requirements and social criteria at every stage.

For HERTH, it is the foundation of everything we source.

OCS 100 — Organic 100 Content Standard

Verifies the presence and traceability of organically grown fibres from origin to finished material — providing an additional layer of transparency on the organic content of our fabric.

OCS Blended — Organic Blended Content Standard

Where products combine organic and non-organic fibres, OCS Blended certifies the organic content and ensures traceability across the supply chain.

$Logo STANDARD 100 by OEKO-TEX® – international certification ensuring HERTH textiles are tested for harmful substances and safe for skin.$

STANDARD 100 by OEKO-TEX®

An independent certification testing textiles for harmful substances at every stage of production. OEKO-TEX® STANDARD 100 provides assurance of chemical safety throughout production — reinforcing our commitment to materials that are naturally gentle on the skin.

GRS — GLOBAL RECYCLED STANDARD

Verifies the traceability and composition of recycled materials — applied to the recycled polyester used in our garment labels, ensuring responsible sourcing and production practices throughout.