shell and cuff material: Tr. Polyether - Soft last width: M (medium) flex index: 80/70 liner: Comfort Fit FSE foot bed: Comfort Fit flex adjuster: Hard/Soft buckles: 4 Micro Alu + 2 Servolock on cuff velcro strap: ENERGY DRIVER (by BOOSTER®), 35 mm wedge: Full Shock Eraser rear spoiler: Height Adjustable