| Material Type | Certification Standard | Carbon Reduction Path | Biodegradable | Compatibility | Typical Applications |
|---|---|---|---|---|---|
| Bio-circular | ISCC PLUS | Biomass mass-balance carbon reduction | No | ★★★★★ | Foamed midsoles, insoles, rubber outsoles |
| Bio-based | BETA | Carbon reduction through bio-based feedstocks | Depends on formulation | ★★★★☆ | Rebound foam, flexible rubber parts, air cushions |
| Compostable | BPI, TÜV OK Compost, DIN CERTCO | Bio feedstocks plus industrial compostability at end of life | Yes | ★★☆☆☆ | Insoles, protective gear, packaging |
🌿 Bio-Circular Materials
Concept
- Partially replaces petrochemical feedstocks with plant-based sources such as Used Cooking Oil (UCO) and palm oil, produced under a mass-balance approach.
- Relies on renewable energy—solar, hydro, and more—to shrink the overall carbon footprint.
Advantages
✔ Achieves carbon reduction without changing existing molds or manufacturing processes.
✔ Certified to ISCC Plus standards.
✔ Delivers stable quality at high production volumes.
Sample Applications
SPARK SuperBIO
Bio-Circular EVA high-performance running shoes
🌱 Bio-Based Materials
Concept
- Uses renewable plant sources such as castor oil, bagasse, corn-derived sugars, glycerol, and lignin, delivering partial or fully bio-based carbon content.
- Not required to be biodegradable, yet it reduces reliance on petrochemical feedstocks.
Advantages
✔ Certain grades provide high rebound, softness, and optical clarity.
✔ Meets USDA BioPreferred and EU BioCarbon benchmarks, verified by BETA through carbon-14 testing.
✔ Compatible with current injection-molding and foaming processes.
Sample Applications
Bio-based EVA, TPU, TPEE, and PEBA supercritical-foamed midsoles with 20–70 % bio content
SPARK SB87 BIO TPEE
🍃 Compostable Materials
Concept
- Decomposes into water and CO₂ under industrial composting conditions (about 60 °C, high humidity, oxygen present) with no toxic residues. Meets international standards such as BPI, TÜV OK Compost, and DIN CERTCO.
Advantages
✔ Offers a sustainable end-of-life route for single-use products.
✔ Reduces microplastic pollution.
✔ Fits applications designed around end-of-life considerations.
Sample Applications
Compostable PLH foamed sheets for insoles, protective gear, and packaging
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