La Machine Massive 4 bridges the gap between the 3 and the über-fat 5. La Machine 4's construction mirrors that of the 3. This 117mm beauty perfectly suits the skier who craves a wide yet light free-touring ski for extended backcountry missions, when soft snow is on the menu. La Machine 5 is the dream heli or cat tool, while the 4 holds its own edging on firmer snow, providing trustworthiness when one finds oneself in a hairy spot off the grid.