shell and cuff material: Tr. Polyether- SOFT last width: MN (medium-narrow) flex index: 130 liner: Performance Fit FSE AIR liner lasting concept: FSE Plus foot bed: Performance Fit Pro buckles: 4 Micro Alu + 2 Servolock on cuff velcro strap: TWIN ENERGY DRIVER (by Booster®), 45 mm wedge: Full Shock Eraser front spoiler: Direct Driver rear spoiler: Quick Set Spoiler FSE heel height: 43mm