The GEL-KAYANO™ 31 shoe creates a stable and comfortable underfoot experience for young feet. Asics also updated the midsole with FF BLAST™ PLUS ECO cushioning. With approximately 24% bio-based content, this material helps create cloud-like softness in every step.? Lastly, the toe-rubber stitching and medial forefoot wrap-up outsole help to improve the shoe's durability.