The Alpina BC 1550 NNN BC backcountry boot has the features you need for a full day of comfortable backcountry touring. Alpina's Thinsulate-lined upper keeps your feet warm and dry. The BC 1550's wraparound plastic cuff allows for full range of motion but provides great stability and the control you need to push your cross-country skis through deep snow. This boot's sole flexes in the toe but is torsionally rigid for steep descents. The Alpina BC 1550 is only compatible with the NNN BC binding.