The Men's Alpina BC 1550 Nordic Cross Country Ski Boots are designed for long backcountry trekking excursions with few aggressive pitches. The Thinsulate® insulation keeps you dry, warm, and comfortable enough to wear these boots all day. The BC 1550 is a durable synthetic construction designed for a great fit with an Alpitex® membrane that is water-resistant and allows for good boot ventilation as well as comfort for the foot. The Plastic Cuffs and Heel Counter offer firm support and control on descents. They have a medium level of flex in the midsole for ample kick and glide while still providing stability. The NNN BC (backcountry) system rubber soles are compatible with NNN BC manual or auto bindings for high-performance all terrain maneuvering. The Alpina BC 1550 Boots are perfect for serious backcountry skiers looking for a combination of warmth, durability, comfort, and performance for all day activity.