HIGG Index Guide 2026: Sustainable Apparel Coalition

The Higg Index is the apparel, footwear and home textile industry’s most widely used suite of sustainability measurement tools. Developed to give brands, retailers and manufacturers a common language for environmental and social performance, it underpins benchmarking, improvement planning and supply-chain transparency across the sector. This guide explains what the Higg Index is, who runs it, the modules it contains, and how its flagship Facility Environmental Module (Higg FEM) is verified.

What Is the Higg Index?

The Higg Index is a suite of tools that enables brands, retailers and facilities of all sizes — at every stage of their sustainability journey — to accurately measure and score a company or product’s sustainability performance. Rather than a single pass/fail certificate, it is a standardized measurement framework: it delivers a holistic overview that helps businesses identify strengths and weaknesses, benchmark performance against peers, target improvements, and share verified data with value-chain partners.

Who Develops the Higg Index?

The Higg Index is stewarded and governed by Cascale, the global non-profit alliance formerly known as the Sustainable Apparel Coalition (SAC). Cascale was born in 2009 from an unusual collaboration between Walmart and Patagonia, which set out to build a universal approach to measuring sustainability performance across the apparel, footwear and textile sector. Today Cascale unites more than 300 retailers, brands, manufacturers, governments, academics and NGOs, and its Higg Index tools are used by over 40,000 people worldwide.

Cascale governs the Higg Index frameworks, modules and methodologies, while the technology platform through which they are delivered globally — including the self-assessment and verification workflow — is operated by Worldly. The Higg Index is exclusively available on Worldly.

The Higg Index Modules

The Higg Index is composed of several connected modules, each focused on a different part of the value chain. According to Cascale’s official definition, the suite includes:

• Higg Facility Environmental Module (Higg FEM) — measures the environmental performance of individual facilities.
• Higg Facility Social & Labor Module (Higg FSLM) — measures social and labor conditions at the facility level.
• Higg Brand & Retailer Module (Higg BRM) — helps brands and retailers assess their own operations.
• Higg Materials Sustainability Index (Higg MSI) — evaluates the environmental impact of materials.
• Higg Product Module (Higg PM) — assesses the sustainability performance of finished products.
• Higg Design & Development Module (Higg DDM) — supports earlier-stage design decisions.

Cascale’s current flagship tools are the Higg BRM, Higg FEM, and the Higg Product Tools (Higg PM and Higg MSI), with Higg FSLM used widely for social and labor assessment.

Inside Higg FEM: What It Measures

Higg FEM is the environmental self-assessment that the largest number of factories complete. It gives manufacturers, brands and retailers a clear picture of a facility’s environmental impacts and helps prioritize improvement opportunities. Facilities answer a set of questions housed on the Worldly platform, organized into environmental impact areas that include:

• Site Information & Permits — facility profile, operating licenses, environmental permits and compliance status.
• Environmental Management System (EMS) — policies, significant-impact identification, training and incident reporting.
• Energy — energy sources, consumption tracking and renewable-energy procurement.
• Water — water sources, consumption tracking, water-risk assessment and context.
• Wastewater — generation, treatment, discharge compliance, sludge handling and monitoring.
• Air Emissions — point, mobile and fugitive emission-source inventories and compliance.
• Waste — hazardous and non-hazardous waste streams, segregation, storage and disposal.
• Chemicals — chemical management systems, inventories, Safety Data Sheets, MRSL/RSL alignment and handler training.

A “Facility Foundations” subset captures the foundational environmental practices (Foundational Environmental Performance) that any responsibly operating facility should demonstrate.

How Higg FEM Verification Works

Facilities complete the Higg FEM as a self-assessment. To make the data credible and publicly communicable, it can be verified through Cascale’s Higg FEM Verification Program, governed by the Higg FEM Verification Protocol Version 1.5 (November 2024, effective 1 January 2025).

Verification is performed by Verifier Bodies — companies qualified and approved by Cascale — under the oversight of the Verification Program Manager (VPM), which is Sumerra. A Lead Verifier is responsible for the verification and the resulting report. Verification may be onsite or offsite, and each verification includes an opening meeting, dialogue with facility staff, site observations, photographs where appropriate, and a closing meeting. The outcome is a verified Higg FEM (vFEM) completed on the Worldly platform.

The program deliberately uses “verification” language instead of “audit” language. For example: an auditor becomes a verifier, an interview becomes a dialogue, “non-compliant criteria” become “missing criteria,” and a corrective action plan (CAP) becomes a performance improvement plan (PIP). The point is to support improvement rather than simply to pass or fail.

Higg FEM vs a Certification Audit

It is important to understand that Higg FEM is not a certificate with a pass/fail grade. It is a self-assessment whose data is then verified for accuracy and reliability. Verification confirms that the reported information is trustworthy; it does not issue a “certified” stamp in the way a management-system standard does. Facilities repeat the FEM on an annual cadence, and verification is repeated each cycle so that year-on-year performance can be tracked and benchmarked.

How to Complete and Verify a Higg FEM

The typical workflow for a facility is:

Step 1: Complete the self-assessment on Worldly

Answer the Higg FEM questions across the environmental sections for your reporting period, uploading supporting documents as needed.

Step 2: Engage a Cascale-approved Verifier Body

Select a qualified Verifier Body and agree on the verification scope, type (onsite or offsite) and arrangements.

Step 3: Conduct the verification

The verifier team holds the opening meeting, reviews quantitative metrics, dialogues with staff, observes the site, and holds the closing meeting.

Step 4: Finalize the verified module (vFEM)

The verifier records findings and comments, and the facility reviews and finalizes the vFEM on Worldly. Once verified, the data can be shared with value-chain partners and communicated publicly.

FAQ: Higg Index Frequently Asked Questions

The following are common questions about the Higg Index and Higg FEM, answered from Cascale’s official materials.

Q: What is the Higg Index?

A: The Higg Index is a suite of sustainability measurement tools developed by Cascale (formerly the Sustainable Apparel Coalition). It lets brands, retailers and facilities measure and score environmental and social performance across products, operations and the value chain, using a single standardized framework.

Q: Who owns and operates the Higg Index?

A: Cascale stewards and governs the Higg Index frameworks, modules and methodologies. The technology platform that delivers the tools globally — including the self-assessment and verification workflow — is operated by Worldly. The Higg Index is exclusively available on Worldly.

Q: What modules make up the Higg Index?

A: The suite includes the Higg Facility Environmental Module (FEM), the Higg Facility Social & Labor Module (FSLM), the Higg Brand & Retailer Module (BRM), the Higg Materials Sustainability Index (MSI), the Higg Product Module (PM), and the Higg Design & Development Module (DDM). Cascale’s current flagship tools are the Higg BRM, Higg FEM, and the Higg Product Tools (PM and MSI).

Q: What is Higg FEM?

A: Higg FEM (Facility Environmental Module) is the environmental self-assessment that measures a single facility’s environmental performance — energy, water, wastewater, air emissions, waste, chemicals and environmental management. Facilities complete it on the Worldly platform.

Q: Is Higg FEM a certification?

A: No. Higg FEM is a self-assessment whose data is verified for accuracy and reliability; it is not a pass/fail certificate. Verification (under the FEM Verification Protocol v1.5) confirms the data is credible and can be communicated publicly, but it does not issue a “certified” stamp.

Q: How often is a Higg FEM verified?

A: Facilities complete the FEM on an annual cadence, and verification is repeated each cycle so that performance can be tracked and benchmarked year on year. Verification may be onsite or offsite, performed by a Cascale-approved Verifier Body.

Q: How do I get started with the Higg Index?

A: Facilities typically begin by completing the relevant Higg module (most often Higg FEM) on the Worldly platform, then engage a Cascale-approved Verifier Body if they need verified data for customers or public claims. Our team can help you plan and prepare — contact us for support.

Conclusion

The Higg Index, governed by Cascale and delivered through Worldly, remains the industry’s reference framework for measuring sustainability performance in apparel, footwear and home textiles. For facilities, Higg FEM is the practical entry point: a structured environmental self-assessment that, once verified, produces credible, shareable data. Understanding the module structure and the verification process is the first step to using the Higg Index for real improvement and transparent reporting.

References

1. Cascale. (2024). Higg Facility Environmental Module (FEM) Verification Protocol, Version 1.5 (effective 1 January 2025). Document # FEMVP2024111.5.
2. Cascale / Verification Program Manager (Sumerra). (2024). Higg FEM Verifier Field Guide, Version 1.1 (November 2024).
3. Cascale. “Higg Index Tools” and “About Cascale” (official website, cascale.org). Confirms Cascale formerly the Sustainable Apparel Coalition (SAC); Worldly delivers the platform; 300+ members and 40,000+ users.