The humble t-shirt is probably the hardest-working piece in your wardrobe, and that makes it one of the most important places to make a sustainable choice. The problem is that every brand claims to be "eco-friendly" and very few give you the data to back it up. We scored these five women's t-shirts using the Fashion Sustainability Index, our methodology that evaluates materials across carbon footprint, water use, pollution, chemical impact and biodegradability, then factors i

The humble t-shirt is probably the most-worn item in your wardrobe, which makes it one of the most impactful places to start buying more sustainably. The problem is that most "best sustainable t-shirt" lists give you vague ratings with no real way to compare one pick against another. You're left trusting someone's gut feeling about whether a brand is "good" or "great." We took a different approach. Every t-shirt in this guide has been scored using the Fashion Sustainability I