What is it?

This is the part of the boot between the insole and the outsole. Until a short time ago, this part was identical in all boots.

This area is often used to include systems providing stability to the foot, either when running or striking.

adidas Powerspine

Adidas, after pioneering the protection system for gloves with its Fingersave system, has tried to transfer this technology to boots. The same system as the Fingersave is used in this case to avoid the loss of energy when hitting the ball. In the tests, after analyzing in slow motion the hyperextension to which the foot was subjected in a strike, Powerspyne was adapted to allow the foot to make the natural flexion movements during the run but prevent the hyperextension with which power is lost in he hit.