What part of the ski is the cross-country skiing traditional board stirrup section in the

The stirrups of a cross-country ski are located in the middle of the ski. Traditional skis have a distinct bowed arc, indicating that the ski is relatively high in the middle section and low at the front and back ends. During gliding, the center section is the area used for stomping and pushing, while the front and back ends are used for gliding and steering. In order to increase the grip of the center section and to make pedaling more stable, the area is waxed with anti-slip wax. The gliding part should be coated with slip wax to reduce friction and make gliding smoother.