shell material: Polyether-EXTRA SOFT cuff material: Polyether-SOFT last stance: NFS - Natural Foot Stance last width: N (narrow) flex index: 130 liner: Racing Fit PULL -UP foot bed: Racing buckles: 4 Micro Alu + 2 servo-lock on cuff (screwed) velcro strap: 45 mm Twin Energy Driver (by Booster®) rear spoiler: Quick Set heel height: 43mm