shell and cuff material: Tr. Polyether-SOFT last width: M (medium) flex index: 90/80 liner: Precision Fit FSE AIR liner lasting concept: FSE Plus foot bed: Precision Fit flex adjuster: Hard/Soft buckles: 4 Micro Alu + 2 Servolock on cuff velcro strap: TWIN ENERGY DRIVER (by BOOSTER®), 45 mm wedge: Full Shock Eraser rear spoiler: Height Adjustable