The new Lupo AX HD targets the freeride-oriented customer who wants the full set of touring functions combined with a stiff, durable, high performance shell and tongue. With its comfort-enhancing 100mm last, this model is built specifically for the local, patroller, and die-hard big mountain skier. Utilizing the popular Krypton architecture, this boot comes with tech inserts and a removable Kinetic Response Tongue that goes on and off in an instant. With a 110 flex, the Lupo HD's shell is made from the same Polyurethane used in our race boots. It comes in at a reasonable 1960 grams in ski mode, and just 1835 grams with tongue removed for hiking.