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 is built from coated leather with a plastic cuff so it has the comfort of a leather shoe with the control you need to push your cross country skis through deep snow. The Alpina BC 1550 NNN BC backcountry boot is only compatible with the NNN BC bindings. Bottom Line: Alpina is the authority in leather NNN BC boots and the BC 1550 demonstrates why.