Firm-flexing and responsive with the micro-adjustability of a BOA Fit System. Season after season, the Ion sets the bar for responsive feel and out-of-the-box fit. The men's Burton Ion BOA Snowboard Boots take it one step further with high-power micro-adjustable tensioning for the upper and lower boot. Combined with a firm flex, they support full-speed-ahead charging for riders who like to rip. Warm, dry feet and unmatched control for dropping lines and sticking landings are all yours.