shell material: Polyurethane cuff material: Polyurethane last width: MN (medium-narrow) flex index: 80 cuff profile: Jr liner: Performance Fit JR PULL-UP foot bed: Performance Pro JR buckles: 4 Micro Alu + 2 Servolock velcro strap: 35 mm rear spoiler: Quick Set Jr heel height: 43 mm