The Nitro Chase Dual BOA Snowboard Boot has a stiff versatile flex a micro-adjustable zonal BOA Fit System and the design experience to tie it all together. Before we ride we twist the dials to lock it our best fit but that's not the only way we ensure security from first chair to last. Nitro's liner lacing system complete with Re/Lace locker keeps the liner snug around the foot and it's equally easy to adjust on the fly. In addition to this boot's basically perfect fit it's got an astounding arrange of comfort- and performance-oriented features from top to bottom. The Armored Spine and Flex Link cuff boost the shell's durability while improving the way the boot both holds and maneuvers while the Vibram rubber outsole offers the grip and board feel we expect with the addition of recycled materials for a greener design.