A sustainability claim is most useful when it explains exactly what is being claimed and provides evidence. Broad words such as “green” or “eco-friendly” can mean many things, so begin by asking what part of a garment or process the statement addresses.
Look for a specific claim
Does a recycled-content statement identify the material and percentage? Does it refer to the whole product or only a component? The US Federal Trade Commission advises consumers to look closely at environmental marketing claims. Rules and enforcement differ by jurisdiction, so consult the relevant authority for the market concerned.
Ask what is missing
A single material choice does not describe a product’s complete environmental impact. Production, transport, use, durability, repair and end-of-life systems can all matter, and trade-offs may exist. A certification or report can be useful, but check what it covers, who operates it and whether the claim matches its scope.
Consider use and care
The Ellen MacArthur Foundation explores business models that keep clothes in use for longer. For an individual reader, wearing, maintaining and repairing suitable clothes may be practical steps, but no single action proves that a product is sustainable. Be cautious of rankings without clear methods and evidence.