Tree Runners
"Lightweight sneaker made from TENCEL Lyocell (eucalyptus tree fibre). Great for warmer weather. Same SweetFoam sole, machine washable."
Expert Verdict
This product is manufactured by Allbirds, which achieves an overall Hummlan Sustainability Score of 78/100. Allbirds is rigorously vetted across our five core sustainability pillars, including EU Taxonomy alignment and robust environmental disclosures. Check our detailed pillar breakdown below to see how this product scores across environmental and ethical standards.
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Check the brand's siteSustainability Breakdown
Regenerative wool and sugarcane sourcing commitments and FSC-certified packaging; no formal biodiversity programme published.
Minimal repair or resale program; some recycled content in materials and FSC-certified packaging, but no take-back; durability concerns on wool styles.
Publishes product carbon footprints and is Climate Neutral certified; neutrality relies heavily on offsets rather than absolute Scope 3 reductions, and targets are not SBTi-verified.
Natural materials (wool, TENCEL, sugarcane EVA) replace petroleum synthetics across most of the range; some styles still use synthetics (e.g. Tree Dasher).
Certified B Corp (score ~82); public ESG reporting as a listed company; supplier and factory transparency published.
Our ratings are "stern but fair", based on third-party certifications and EU Taxonomy + CSRD alignment. We prioritize verifiable data over brand marketing claims. EU Taxonomy and CSRD explain the framework backbone.
This score follows our published framework. See EU Taxonomy and CSRD explainers for the evidence logic behind each rating pillar.