Asics GEL‑KAYANO 31 is a stability running shoe that pairs adaptive 4D Guidance stability with plush FF BLAST™ PLUS ECO and PureGEL™ cushioning for comfortable long runs. Key attributes: Breeze | White | Synthetic fiber | Adaptive stability (4D Guidance System) | Plush cushioning (FF BLAST™ PLUS ECO & PureGEL™) | Breathable upper | Reflective details for visibility | OrthoLite™ X-55 sockliner | Hybrid ASICSGRIP™ outsole (ASICSGRIP™ + AHARPLUS™) | External heel pad for added stability | Mesh upper | Knit collar | Lace-up closure | External heel stabilizer | Dimensions & fit: EU 36 | US 5.5 | UK 3.5 | BR 34 | CM 22.75 | Width: Standard (B) | Composition & care: 99% synthetic fiber | 1% synthetic leather | Hand wash; dry away from direct sunlight. Do not use a hard brush or bleach.