Shell/Cuff/Tongue: PE/PE/PU Technology: Cabrio Design Architecture, Lightweight Construction, Split Fit Tongue, Convenient Entry/Closure, Kinetic Response Polyamide Tongue, Contour 4 Shell Fit, Dynalink Rearfoot Retention. Center Balanced “Rocker” Stance, Low Contour Profile Cuff Key features: Hike/Ski Cuff Mechanism, Adjustable HeelInclinator, Adjustable Flex, Canting, Cuff Volume Expansion Adjustment, Rubber Clad Hike Sole, Replaceable Dura GripTM toe/heel F516 Alu - 3 Micro Adj Liner: 1. Trufit Performer Lady - Thinsulate® 2. I.D. Now – Custom Fit |