the tough step on® boot without compromise. want a snowboard boot that doesn't sacrifice anything? the burton team also always likes to reach for the ion. the tough all-mountain boot is full of sophisticated technology and sets the bar high for boots. it has been equipped with every conceivable feature and is also available as an ion step on® for the simple, intuitive binding that will make you faster than anyone else on the mountain. outer bootthe step on® backstay on the back of the boot provides extra grip between boot and binding and is specifically designed for the step on® binding. the 1:1 powerup tongue with firm flex provides more suspension and resistance. rebounce cushioning gets even closer to your feet. this additional layer is attached to the outer boot and offers more impact protection directly under your foot. the step on® est® outsole combines grip and traction to give you a more direct connection to your board. low profile, lighter and with reduced ramp angle, est creates a lower centre of gravity and improves board feel. linerthe life liner with ultralon performance foam® has excellent thermoformability and adapts the liner to the shape of the foot. the responsive pu tongue provides speed and resistance to fatigue, showing excellent performance over a long period of high use. dryride heat cycle lining captures, radiates and reflects body heat inwards to keep feet warmer while wicking away heat-trapping moisture. the autocant padding is made of dual density eva and allows the foot to find a natural, relaxed position. this results in more comfort, less fatigue and more direct board control.the tuff cuff increases heel stability and wraps the ankle with medial and lateral support. it also allows a free flex from the heel to the toes.lacing systemwith the powerful, unobtrusive speed zoneâ„¢ lacing, the boot laces up super fast and adjusting the top and bottom is just a matter of seconds. powerful lacing means more rebound, support and response with less effort. an additional boa® lacing system provides even more support and stability.new england rope laces make your boots virtually indestructible, which burton guarantees for life.