A soft rubber insert provides grip for walking on slippery surfaces, combined with the Head SoftWalk heel, this makes walking even easier and safer. The Head Edge + 10.5 Ski Boots have a HeatFit liner that is Sanitized® with an HP Anatomical Footbed, 35mm Velcro. This boot has 4 Micro-Adjustable alloy buckles and 1 Supermacro ratchet give you a snug and comfortable feel all day. A lateral frame reinforces the shell of the EDGE+ models in order to put even more stability and performance in to the boot. It also has a medium flex index of 80/70.