1.A more accurate feeling of fitting and comfort are kept for a long time
<Boa closure system> keeps a feeling of high fitting by the equal clamping that the whole foot does not have the unreasonableness. Furthermore, I suppress the slack for the movement of every foot, and an exclusive wire lace superior in the durability keeps comfort for a long time.
2.Putting on and taking off is smooth
When <Boa closure system> turns a dial, an exclusive wire race tightens a foot, and an exclusive wire race relaxes when I draw a dial. I enabled smooth putting on and taking off while keeping a feeling of high fitting.