Mizuno Wave Neo Ultra Women's Running Shoes Undyed White/Black : Comfort meets sustainability in the Mizuno Wave Neo Ultra! Every element of this eco-friendly running shoe leaves a lighter footprint, from the MIZUNO ENERZY LITE midsole to the undyed knit upper. 70% of the upper and midsole materials are made from sustainable sources. As part of the Wave Neo collection, a partnership with the National Forest Foundation, Mizuno planted 100,000 trees to balance this shoe's carbon footprint. Shoe Technology Upper: WAVEKNIT(TM) upper combines excellent airflow with soft materials for a seamless fit. Undyed white color saves water while providing comfort. Sockliner includes more than 90% recycled content, made with algae from BLOOM(TM). Midsole: Castor bean oil based MIZUNO ENERZY LITE for a plush sensation. MIZUNO ENERZY CORE delivers a soft and resilient ride, improving comfort and responsiveness with every step. Bio-based MIZUNO ENERZY (FOAM) works with the other midsole materials for a unique underfoot experience. Outsole: G3 Outsole provides superior grip with less weight. G3-DR provides added durability in key contact points.