shell and cuff material: Tr. Polyether-SOFT last width: MN (medium-narrow) flex index: 100 liner: Precision Fit FSE foot bed: Performance Fit Pro buckles: 4 Micro Alu + 2 Servolock on cuff velcro strap: ENERGY DRIVER (by BOOSTER®), 35 mm wedge: Full Shock Eraser rear spoiler: Quick Set Spoiler FSE heel height: 43 mm