The Lange RX 120 GW is an ideal boot for advanced and expert skiers looking for a high-performance boot without the overwhelming stiffness of a 130-flex boot.  And as the name implies, you get a 120-flex boot with plenty of progressive power, while a 100 millimeter last provides the right amount of volume for mid- volume feet.  Lange's dual core shell allows you to flex forward with power and precision, reacting dynamically to the movements of your body while you ski. Working with the shell in tandem, the RBT tongue, constructed with high energy polyurethane material, delivers even further rebound in response to every minor motion. While performance is priority, comfort is key in the world of ski boots. With the 100% customizable thermo liner, molding these boots to fit your exact feet is a major benefit. Focusing on crucial pressure points, you have the ability to take the comfort of your feet, and ultimately your overall performance, to the next level.