comfortable all-mountain boot with perfect boa® fit. setting the bar higher in every discipline, the burton ion boa® boot is the menâ€™s all-mountain boot to feature dual zone high power focus boa® lacing, the pinnacle offering for an optimized fit. the ion is legendary for its stacked tech package upgraded with burton's life liner for lightweight comfort and enhanced rebound. nothing stands in the way of long days on the mountain with the ion.outer bootthe shrinkage® footprint reduction technology reduces the bootâ€™s overall footprint in one full size. all burton boot tongues feature a snow-proof internal gusset construction to completely seal the lower zone of the boot, keeping feet warm and dry. the firm flexing 1:1 powerup tongue provides an increased response with great rebound and durability. lower-profile, lighter weight, and with a reduced ramp angle, the est® midsole lowers your centre of gravity and improves feel. all without sacrificing an ounce of cushioning thanks to ultra-dampening b3 gel inserts. the all-new autocant outsole ensures best grip in all situations. added warmth and consistent performance in cold temperatures is achieved by wrapping it in a heat-reflective material that keeps the cushioning soft and effective.linerthe life liner uses lightweight materials with a more relaxed feel for high-end performance. the responsive pu tongue construction provides a combo of cat-like quickness and long-term resistance to breakdown, while also accommodating a better fit for all foot shapes. the breathable dryride heat cycle® lining technology utilizes interwoven thermally activated carbon thread to capture, radiate, and reflect body heat. ankle support and inner cuff stability are mandatory in a pro-level boot. burtonâ€™s solution is the tuff cuff, which increases heel hold and wraps the ankle with medial and lateral support while still flexing freely from toe to heel.lacing systemdual zone high power focus boa® features h3+ coiler dial with coiler technology to increase the speed of entry and quickly take up loose lace. the 4:1 gear ratio and cushioned grip make it easier to get the fit you want with four effortless turns instead of one. tx3 is a flexible and low-friction textile lace used in high-power boots to provide a soft, modern design aesthetic with lasting durability and strength.