The X3 60 comes with a mono-material PU lower shell, which is made of polyurethane and is made with a consistent density that is to facilitate progress on snow with little effort from the junior skier. This boot also comes with a thermicfit liner, which is made from anatomical foam and maintains comfort and warmth throughout the day. The Salomon X3 60 also comes with 4 micro alu/plastic buckles, which adds durability through the aluminum, and work together to micro-adjust the length of the buckles, to the rider's satisfaction.
This boot is comparable to the Salomon Impact Jr, which has a lot of the same junior features, but comes equipped with 4 micro titanium buckles.