Move from apprehensive to assertive with the GT-2000? 13 shoe��s 3D GUIDANCE SYSTEM? technology.? Designed to help provide adaptative on-demand stability, this shoe's support properties allow you to experience a smooth and balanced transition from footstrike to toe-off. The midsole implements a full-length FF BLAST? PLUS cushioning unit and PureGEL? technology. These features help provide a more energized toe-off with cloud-like softness underfoot. ?