Tree Runners Shoes
Shoes made from eucalyptus tree fiber (TENCEL Lyocell) and recycled materials. No PFAS. Allbirds is transparent about their material sourcing.
How scores are calculated
Materials (40%): How plastic-free the product is — raw materials, construction, and coatings.
Packaging (20%): Is the product packaged in plastic? Is it recyclable?
Transparency (20%): Does the brand disclose ingredients, sourcing, and manufacturing?
Durability (20%): How long does it last? Longer-lasting products reduce plastic waste over time.
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Last updated: April 6, 2026
Clothing is in contact with skin for 16+ hours daily. Conventional clothing contains PFAS stain-resistant treatments, formaldehyde anti-wrinkle finishes, synthetic dyes, and flame retardants. These chemicals are absorbed through skin and inhaled from off-gassing fabrics.
Why We Recommend This Product
Allbirds' Tree Runners use eucalyptus TENCEL Lyocell — a sustainable, non-toxic material. No PFAS treatments. Allbirds is one of the most transparent footwear brands about their materials and environmental impact.
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