Details Whether it's racing or recreational, based on the successful Xcelerator binding system, the Fischer Xcelerator Pro Classic is perfected for the requirements of the classic cross country skiing style. Binding System NNN NIS Skiing Style Classic Flex 40 ShA Construction Action: Manual Quick Lock: The Quick Lock function enables you to fix and position the binding individually on the ski without any tools. An NIS key is no longer required whenever a quick adjustment is necessary. Boot Size Range 35-52 Weight 200g Fischer Xcelerator Pro Classic NIS Nordic Bindings 2016