With the micro-toothed 3D-shaped transaction rails, the Viper 2.0 toe spikes, and the new ActiveFit 2.0, the Flex Clm sets new standards for all backcountry enthusiasts. The new cinch strap feature provides comfort, support, and easy entry and exit, while the torsion deck reduces strain on the joints and allows for a natural gait through steep and icy terrain.