In 2008, Black Diamond started a revolution in skiing by introducing the Factor, a freeride-inspired alpine boot with a walk mode. That innovation continues in 2011 with the new Factor 130. Now with a completely new liner, this powerful boot is warmer, stiffer and better fitting than its predecessor. For hard chargers who simply need one boot to do it all, this Flex 130 boot continues its tradition of no-boundaries, no-compromise skiing performance. It includes BD Alpine Sole Blocks, and is compatible with BD AT Sole Blocks with integrated tech inserts (sold separately).