The Salomon X/Pro 120 Ski Boots are the perfect choice for skiers who demand high performance and a customized fit. Custom-moldable shells adapt to feet for a superior fit that eliminates pressure points and improves performance. Rigid lower shells provide power transmission where it’s needed in the heels, along the sides of the feet and in the binding contact areas. Supple upper shells offer appropriate rigidity above your insteps, in the progressively flexing cuffs and in the supportive and flexing backbones of the shells. Twinframe2 design delivers improved rebound and dynamic flex, while oversized pivot provides efficient transmission for downhill performance. Oversize 24mm pivot between bottom shells and upper cuffs results in greater transmission and power distributed throughout the sole of the boots compared to typical 8mm pivots. Pre-shaped CustomFit 3D liners grip ankles and heels without pressure, and custom-formable foam conforms under feet, over insteps and along shins for superior foothold. Flex adjustment system allows for enhanced comfort. 4 micro aluminum buckles are lighter weight than traditional buckles and articulate for comfort. Stiff flex index of 120 provides the power transfer appropriate for advanced skiers. 45mm power straps offer additional performance and energy transmission. Heel and toe removable din pads. This pair is in excellent condition with only a few minor scuffs from wearing them for 3 days at the resort. I found out that the size for me was little too small. As much as I like the boots, I have to get a larger size. See photos and ask questions.