Pro molded anatomical ankle support eliminates boot breakdown Durable vented vamping and T-RIB toe cap provide ventilation through the Air Exchange System Comfort foams form to the ankle minimizes break-in Anatomical felt tongue combined with HD lace bite provide comfort MAX ARMOUR applied to embossed package provides protection and durability Anatomical response high density footbed has a natural heel cup for comfort Low profile outsole ensures solid boot interface Chassis: TRI-DI Extruded 6000 aluminum provides strength and performance Floret single tool axle system Wheels: Rink Rat VT 733 Bearings: 608 ABEC-5