The Rottefella XPlore Backcountry Free Pivot Plate provides freer rotation and more comfortable walking in steep terrain and when pulling a pulk. Flex is a flexible pad which provides bending resistance. It helps you control the skis and gives you a more natural kick-and-return cycle. You can easily change the All-Round flex that comes with the binding to Rottefella Xplore Free Pivot Plate. Comes in pairs.