"With our most innovative materials and feature set, it goes without saying that the Acid Double BOA® snowboard boot is designed for ‘peak performance’. All jokes aside, the Acid is the most aggressive, high-performance boot in the line, feeling at home in the most extreme terrain & conditions. What really makes this boot stand out is the seamless integration of our Progressive FlexTongue, and an AuxTech® powerstrap with the NEW Dual H5 BOA® System, allowing you to fine-tune your fit and flex independently. Add in the DryKnit SnowGuard and a durable, grippy Vibram® outsole, and you’ve got a premium snowboard boot that looks as good as it fits.