The Boa closure ensures a precise fit over the instep on the K2 Mindbender 120 Boa boots, while the cuff section features two traditional micro-adjustable buckles. The Powerlock Spyne mechanism releases the boot into walk mode, providing a comfortable 50° range of motion in the cuff. - Medium last - Flex 120 - Powerlite shell - Precisionfit Pro Tour liners - GripWalk soles - Boa adjustments move in 0.25 mm increments - Two buckles and a non-elastic strap tightened with an eccentric buckle - Compatible with both tech bindings and DIN bindings