MATERIALS & PLANET
SA77A Sustainable Sneakers: The Art of Thoughtful Material Selection
At Sa77a, every sneaker starts with a simple question: how can this pair feel comfortable for you and light on the planet?
We design from the inside out, choosing sustainable materials that do their job, protect nature, and carry a story you can stand behind.
Uppers: Giving Agricultural Waste and Landfill‑Bound Materials a Second Life
Reclaimed & Recycled Materials with Measured impact and Meaningful progress.
- 3 reclaimed sails Up-cycled.
- Mesh crafted from 100% recycled PET equivalent of ~0.2 kg CO₂e saved per pair.
- At least 30% corn waste content in selected materials equivalent of ~0.6 kg CO₂e saved per pair.
Through these material choices, each pair avoids approximately 0.7–0.8 kg of CO₂e emissions compared to conventional alternatives.*
A measured reduction achieved through intention equivalent to:
🚗 crossing Hong Kong Island end to end.
📱 80–100 full phone charges.
💡 Running a 10W LED bulb continuously for about 4 days.
Nothing exaggerated. Nothing overlooked.
Only progress, made responsibly.
*Estimated based on material weights per pair and established industry life-cycle benchmarks.
Behind every upper is a small act of repair: less CO₂ in the air, less waste in landfills, and a tangible step toward more eco‑friendly footwear you can wear every day.
Lining: Soft on Your Skin, Light on the Planet
REWAVE™ Lining is developed with compostability in mind — delivering softness and performance while considering its end of life, designed to break down under the right conditions instead of living for hundreds of years as microplastics.
Independently tested under internationally recognized standards:
- ISO 15985:2014 — 94.5% soil biodegradation* within 309 days.
- ASTM D6691 — 56.1% marine biodegradation* within 441 days.
*Biodegradation rates are based on laboratory testing and depend on specific environmental conditions.
Footbed: Natural Antibacterial Materials That Shape Around Your Feet
Cork’in™ Footbed - FSC-certified cork layered over resilient coconut husk fiber, a naturally adaptive support, absorbing every impact while gently molding around your feet for greater comfort and stability.
A material combination that is naturally antibacterial and breathable, providing structural resilience and impact distribution.
Comfort that evolves. Stability that lasts.
Laces: Natural Hemp Ties to Bring It All Together. Strong by nature. Responsible by design.
Chosen for their strength, durability, and lower impact, they’re the final natural touch to our sustainable sneakers.
Hemp requires minimal water and chemical input, grows rapidly while absorbing carbon, and returns naturally to the earth at the end of its life.
A small detail — chosen with intention.
Outsole: Natural Grip for Stable Steps
Made with a minimum of 10% FSC-certified natural rubber — balancing performance with responsibility. Every step leaves a lighter mark, even when your pace is fast.
Confident traction. Considered impact.
SA77A Partners: Intentionally Chosen to Reflect Our Values
Disclaimer: We’re Not Claiming Perfection
Every SA77A pair is a small victory—a quiet rebellion against old patterns of the fashion industry, not a perfect solution.
