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