From light running to full marathons, the GEL-KAYANO 31 is designed to provide both excellent comfort and stability. The "4D Guidance System" provides adaptive stability. This foam part, located inside the midsole, encourages the arch to return to the correct position after each ground impact while running, supporting a more efficient run. The midsole also features FF BLAST PLUS ECO cushioning. This foam material is approximately 24% bio-derived, providing soft cushioning while being environmentally friendly. PureGEL technology is placed in the heel area and is approximately 65% softer than conventional visualized GEL technology. The upper has been changed from the previous knit to mesh, improving breathability. The HYBRID ASICSGRIP, which combines ASICSGRIP with excellent grip in the midfoot of the outer sole and AHARPLUS with excellent abrasion resistance in the toe and heel areas, provides both excellent grip and durability.