Ultimate adjustability meets powerful energy transfer within the K2 Men's Thraxis Boa Snowboard Boot. Stiff enough for serious freeride enthusiasts, the Thraxis delivers high levels of energy transfer desired by hard charging riders looking to straight line steeps, carve with precision, and ride faster than anyone on the mountain. Its burly Vibram ProLite sole offers grippy traction over the slipperiest packed snow and roughest alpine terrain, ensuring you don't slip off the mountain when you're hiking. More adjustable than virtually any boot on the market, the Thraxis features three separate Boa dials for complete control over the shell's upper and lower zones, as well as the boot's internal lacing. The Boa Focus system delivers dual zone tightening for dialing in your ideal fit over the upper and lower zones. Keep them as tight as possible for the utmost in response and control, or loosen the upper section for a bit more freedom to play around on the mountain. Controlling the Thraxis' internal lacing, K2's patented Boa Conda offers on the fly liner adjustments. This independent lacing system is threaded through a floating tongue guide to comfortably lock down your ankle and heel from lifting. This means more response for charging at high speeds without excess slop or unwanted heel lift. The boot's Intuition Pro Foam 3D liner is fully heat moldable for a truly custom fit without pressure points. Moldable internal J bars lock down your heel to prevent unwanted lift or excess movement within the boot. Absorbing impact, the dual density EVA footbed cushions the blow of heavy landings with its Harshmellow dampening. And because the Thraxis is meant for hardcore use and abuse, K2 engineered it with an Endo urethane exoskeleton that resists breakdown and retains flex better than traditional stitch and glue construction.