K2 UFO Double Boa Snowboard Boot - Men's: The name "UFO" speaks for it's self. The technology put into this boot far surpasses expectations while buying a boot. The Double BOA lacing system for the outer and inner zones makes it for supreme ankle hold and micro adjustability for maximum comfort. The patented dampening system build into the boot absorbs a lot of the chatter which in turn reduces muscle fatigue allowing the rider to spend more time on the mountain. The most unique feature about this boot is the "ENDO" tech. built into the boot. ENDO is K2's answer for boots breaking down, the ENDO construction allows day 60 of the boot to feel like day one! ENDO is a urethane shell inserted into the boot; This is a material that does not break down! The flex of this boot is bout a 7 out of 10 allowing it to be experienced by any intermediate to expert rider.