The K2 Kinsley snowboard boot features a dual-zone closure with BOA Fit System to micro-tune your fit. A dedicated BOA dial for the upper shell and a second dial dedicated to closing the lower part of the shell.The boot’s upper cuff is constructed with our Flex Zone calf panel at the top of the cuff, helping to keep legs happy all day long. Inside, a supportive three-point harness is integrated into the shell, wrapping itself around a heat-moldable Control Foam 3D liner with award-winning foam from Intuition.