This document provides guidance for facilities to complete the Sustainable Apparel Coalition's Higg Index 2.0 Environmental Facility Module self-assessment. It explains how to read and use the guide, provides an overview of the Higg Index, and offers a section-by-section guide to clarify terms, expectations, and recommendations for responding to each question. The guide is intended to help facilities accurately assess their environmental performance and engage relevant stakeholders in the self-assessment process.