Behind the FFF Brand Rating
The rating is built from what we can actually verify about the materials a brand uses, the certifications behind them, and the claims the brand makes.
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Behind our Fiber Score
We look into the fiber — PRODUCTION → PROCESSING → USE → END OF LIFE — and turn it into a single number.
Where linen comes from changes what it is
Two garments can both say 100% linen on the label and still feel, wear and age very differently.
Not all cotton is the same
Organic, conventional, Pima, Supima, recycled — the word on the label is the same. What sits behind it is not. Here is how to tell them apart.
Not all cotton is the same
Organic, conventional, Pima, Supima, recycled — the word on the label is the same. What sits behind it is not. Here is how to tell them apart.