Sidi has added a small elastic panel to aid in a smooth zipper operation as it allows a bit of movement via the elastic as the zipper passes over the riders ankle ball.
On the outer lower part of the boot an air intake is fitted which can be operated by an aerodynamic shaped button.
The slider is replaceable and available in fully nylon, or one with ceramic or one with aluminium inserts.
A polyurethane shell holds a shock absorbing insert, visible from the outside through small slits that mark out the look of the heel. The shell is mobile as it is fixed to the boot by 2 screws that allow 3 mm of impact movement
The leg portion, in polyurethane, is fitted with the TECNO VR closing system patented by Sidi, to provide adjustments via a nylon thread passing through two lateral holes. Pull on the thread to wrap the boot symmetrically and snugly around the calf.