Available in either FeatherFrame Chassis = 1/3 lower and 1/3 lighter or- Aluminum Plate design for other manufacturer's skis. Single 3D molded tongue Double lacing Taller cuff and medium overall flex Symmetrical footbed with a well-defined heel cup and arch New internal construction for a better fit and increased comfort Medium Density footbed drives responsiveness PVC Free construction ANY SKI 2010 AND OLDER MUST USE THE ALUMINUM PLATE BOOT!!!