Speedboard The Speedboard is engineered for optimal all-day performance, torsional support and stability – stable landings, soft toe-offs. Midsole / outsole The midsole is 50% bio-attributed, reducing the bottom unit’s CO2 footprint by 20%. An updated outsole features connected rubber pods for better traction, grip and durability. Upper The polyester used in the shoe's upper is 100% recycled. We’ve updated the lightweight engineered mesh pattern to create more air flow too, so feet feel fresh.