The verdict
Is The Tree Flyer 2 worth it?
Yes — The Tree Flyer 2 is one of the stronger picks we track in sports & fitness. It holds 3 verified certifications (B Corp, FSC Certified, Climate Neutral). Priced in the $$$ band.
- Cruelty-freeUnverified
- VeganUnverified
- Plastic-free packagingUnverified
- Recyclable / compostableUnverified
- Palm-oil safeUnverified
- Certified organicUnverified
- Fair labourYes
Allbirds
The Tree Flyer 2
Ethics Score
Composite of certifications, ingredient analysis, and sustainability practices.
Certifications
Buy From
* Affiliate links help support EthiCompare's mission.
Customer Rating
Best for
Daily runners and fitness enthusiasts who prioritize breathability and low-carbon manufacturing.
AI Ethics Review
A high-performance running shoe crafted from eucalyptus tree fibers and bio-based foam, designed for long-distance comfort with a low carbon footprint.
Gallery
Claim-by-claim check
The questions shoppers ask most about The Tree Flyer 2, answered from certifications, tags and sourcing notes on file.
- Is The Tree Flyer 2 cruelty-free?
- Unverified — no third-party cruelty-free certification is recorded for The Tree Flyer 2 in our database.
- Is The Tree Flyer 2 vegan?
- Unverified — The Tree Flyer 2 has no certified vegan claim on file; check the ingredient notes below.
- Is The Tree Flyer 2 plastic-free?
- Unverified — we have no plastic-free packaging claim on record for The Tree Flyer 2.
- Is The Tree Flyer 2 recyclable or compostable?
- Unverified — end-of-life handling for The Tree Flyer 2 is not documented in our data.
- Does The Tree Flyer 2 avoid problem palm oil?
- Unverified — no palm-oil policy is recorded for The Tree Flyer 2.
- Is The Tree Flyer 2 certified organic?
- Unverified — no organic certification is on file for The Tree Flyer 2.
- Is The Tree Flyer 2 fairly made?
- Yes — The Tree Flyer 2 is backed by a labour or fair-trade standard.
Ethics Breakdown
Each pillar is independently scored from public certifications, ingredient/material sourcing, and brand disclosures, then averaged into the composite Ethics Score above.
How it compares in Sports & Fitness
Benchmarked against 3 other published products in the same category.
0%
of compared products score lower
-7
points vs the category average
3
verified certifications on file
In-Depth Review
Engineering Nature for High Performance
The Allbirds Tree Flyer 2 is a testament to how natural materials can compete with synthetic rubbers in the athletic world. The upper is constructed from FSC-certified eucalyptus tree fiber, which provides a breathable, lightweight, and flexible fit that conforms to the runner's foot. Unlike traditional petroleum-based polyester uppers, this material is renewable and carbon-sequestering during its growth phase. The result is a shoe that feels airy even during intense summer runs.
Bio-Based Midsole Innovation
The standout feature of the Tree Flyer 2 is the SwiftFoam™ midsole. This high-rebound foam is made using a supercritical foaming process that requires less chemical additives and incorporates bio-based content derived from castor beans. This provides excellent energy return and cushioning while significantly reducing the CO2 footprint compared to standard EVA foam. The geometry of the shoe is optimized for a smooth transition from heel to toe, making it suitable for both daily trainers and longer distance efforts.
Carbon Footprint: Every pair of Tree Flyer 2 shoes has its carbon footprint labeled on the heel, currently averaging 7.21 kg CO2e.
Circular Design Principles
Allbirds approaches design with the end of life in mind. The laces are made from recycled plastic bottles, and the eyelets are bio-thermoplastic. The brand is a founding member of the Climate Neutral movement, offsetting 100% of their operational emissions. Furthermore, they use a regenerative wool lining in certain friction points to maximize comfort without resorting to synthetic padding. This holistic approach ensures that every component is scrutinized for its environmental impact.
| Component | Material Source |
|---|---|
| Upper | FSC Eucalyptus Fiber |
| Midsole | SwiftFoam™ (Castor Bean) |
| Insole | Castor Bean Oil / ZQ Wool |
| Laces | Recycled Polyester |
"We didn't just want to make a green shoe; we wanted to make a fast shoe that happened to be green." - Allbirds Engineering Team
- Machine washable for extended product life.
- Natural rubber outsole for superior wet-surface traction.
- External heel counter made from recycled manufacturing scraps.
Pros
- ✓Extremely breathable upper
- ✓Very low carbon footprint
- ✓Machine washable ease
Cons
- ✗Expensive price point
- ✗Upper may stretch over time
Key Facts
- Brand
- Allbirds
- Category
- Sports & Fitness
- Ethics Score
- 89/100
- Price Range
- $$$ (≈ $160)
- Avg Rating
- 4.6/5 (1200 reviews)
- Drop
- 8.5 mm
- Usage
- Running / Walking
- Weight
- 9.9 oz
- Support
- Neutral
- Materials
- Eucalyptus / Castor Bean
- Certifications
- B Corp, FSC Certified, Climate Neutral
🌱 Sustainability
Allbirds is a B Corp and labels the carbon footprint on every product. They use 100% recycled cardboard packaging.
🧪 Ingredients & Materials
Tencel Lyocell upper. Bio-based SwiftFoam. FSC-certified natural rubber soles.
Price & where to buy
Typically around $160 — prices change often, so check the live listing.
Affiliate links — we may earn a commission at no extra cost to you. It never affects the ethics score.
What Reviewers Say
"The bounce in these feels just as good as my old Nike Pegasus, but I feel better wearing them."
"Perfect for summer runs. My feet never overheat."
"Great for daily 5ks. Not sure I'd use them for a full marathon, but they are my favorite trainers."
Frequently Asked Questions
Is The Tree Flyer 2 by Allbirds ethically made?+
Yes. The Tree Flyer 2 earns an EthiCompare ethics score of 89/100, backed by third-party certifications including B Corp, FSC Certified, Climate Neutral. A high-performance running shoe crafted from eucalyptus tree fibers and bio-based foam, designed for long-distance comfort with a low carbon footprint.
Is The Tree Flyer 2 worth buying?+
The Tree Flyer 2 scores 89/100 on our ethics rating. That puts it in the upper band of the products we track, so it is a defensible buy on ethics grounds.
Is The Tree Flyer 2 cruelty-free?+
We have not verified a third-party cruelty-free certification for The Tree Flyer 2. See our Allbirds verdict page for the brand's full animal-testing position.
Is The Tree Flyer 2 vegan?+
The Tree Flyer 2 does not carry a certified vegan claim in our database. Check the ingredient notes above and the brand's own disclosure before buying.
What are the best alternatives to The Tree Flyer 2?+
We list higher-scoring sports & fitness products from other brands on this page, and a full set of ethical alternatives to Allbirds on its alternatives page.
What certifications does The Tree Flyer 2 hold?+
The Tree Flyer 2 holds the following certifications: B Corp, FSC Certified, Climate Neutral. These independent verifications cover sourcing, animal welfare, environmental impact, and ingredient safety.
How sustainable is The Tree Flyer 2?+
Allbirds is a B Corp and labels the carbon footprint on every product. They use 100% recycled cardboard packaging.
What are the key ingredients or materials in The Tree Flyer 2?+
Tencel Lyocell upper. Bio-based SwiftFoam. FSC-certified natural rubber soles.
How much does The Tree Flyer 2 cost?+
The Tree Flyer 2 is priced in the $$$ range for sports & fitness. Visit the retailer links above for current pricing.
Where can I buy The Tree Flyer 2?+
The Tree Flyer 2 is available from the brand's official website and major retailers. The product page above lists every verified retailer we track.
Is The Tree Flyer 2 plastic-free?+
Unverified — we have no plastic-free packaging claim on record for The Tree Flyer 2.
Is The Tree Flyer 2 recyclable or compostable?+
Unverified — end-of-life handling for The Tree Flyer 2 is not documented in our data.
Does The Tree Flyer 2 avoid problem palm oil?+
Unverified — no palm-oil policy is recorded for The Tree Flyer 2.
Is The Tree Flyer 2 certified organic?+
Unverified — no organic certification is on file for The Tree Flyer 2.
Is The Tree Flyer 2 fairly made?+
Yes — The Tree Flyer 2 is backed by a labour or fair-trade standard.
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