Manufacturer Specs:
Burton Axel Snowboard Boots -  Fully loaded and ready to ride the entire mountain -- the Burton Axel Snowboard Boot is designed around the explosive style of riders like Gabi Viteri. New Sweet Spot Speed Zone™ lacing combines with the new Rad Pad for heavenly heel hold and tightly-laced comfort, while the articulating cuff makes for fluid motion and increased tweak. Take-offs are now lighter and landings softer thanks to the boosted board feel of the new DynoLite EST™ optimized outsole with B3 Gel cushioning.
Flex Rating and Fit:Flex Rating: 4 (1 Soft -- 10 Stiff) Enjoy a more harmonious connection with Burton's True Fit™ design. True Fit means that every element of every piece of your setup has been designed and engineered for the way women ride. Because when it fits right, it rides better.
Construction:The new DynoLite EST Optimized Outsole with B3 Gel Cushioning keeps the boot lightweight and extremely comfortable.
Liner and Lacing:Speed Zone™ laces at the sweet spot around your ankle lock your heels in place, while upper and lower Velcro® Power Straps let you customize the fit of the cuff and forefoot. With three independent zones, you get more control over your fit and comfort, and even easier entry and exit. The Therm-ic Pre-Wired Liners are ready for heat! Simply connect your super slim Basix battery packs (sold separately), and choose between three heat settings. Get total control and all-day comfort with up to nine hours of heat from a single charge.
Special Features:Super light for maximum flight, the Burton Axel Snowboard Boots have an ultra cush Park 2 Molded Footbed with Aegis™ Antimicrobial Coating.