The main purpose of this legislation is to change the rules regarding how garments are classified as water-resistant under U.S. trade laws. This change aims to ensure that clothing labeled as water-resistant meets certain standards, particularly in relation to harmful chemicals known as PFAS. The key provision of this legislation involves modifying the existing requirements for a garment to be considered water-resistant. Specifically, it removes a particular sentence from the current regulations that likely outlines the criteria for this classification.