his item GEL Technology: Cushioning provides excellent shock absorption Gender Specific 3D SPACE CONSTRUCTION: Addresses different compression rates at footstrike per gender. Engineered mesh upper: Reflective accents improve visibility in low-light conditions: FLYTEFOAM Technology: Provides lightweight cushioning. Description The Asics GEL-NIMBUS 23 shoe comfortably wraps the whole foot like a gentle embrace. This design implies fewer layers of material, which results in a lightweight and breathable upper. It is recommended for runners who want a responsive experience while running. Pre-Owned Commotion See Pictures