Setting the bar higher in every discipline, the Burton Ion Boa boot is the only men\'s model to feature Boa Focus lacing, the pinnacle offering for optimized fit. Built to charge hard across the entire mountain, the Ion is legendary for its stacked tech package upgraded with our Life Liner for lightweight comfort and enhanced rebound.The full feature list includes AutoCANT EST soles for natural lower body alignment and superior board feel, DRYRIDE Heat Cycle for enhanced warmth and moisture wicking, and ReBounce tech that both reflects body heat and cushions consistently in freezing conditions.