Soft Instep 2
The Soft Instep Closure System is a wide, anatomically curved strap combined with a soft, thermo-formed EVA pad that distributes pressure evenly over the instep area. The Soft Instep Closure Systemis adjustable from both sides, to perfectly center the EVA pad over a high or low instep. The system eliminates the need for the High Instep Extender. The Soft Instep Closure System is replaceable.

Tecno-II System
Tecno II System uses monofilament line and a fine-tooth ratchet for smooth adjustment and even pressure distribution Allows frontal micrometric closure and adapts the upper of the shoe to the shape of the foot for a customised fit. The Tecno II System can be adjusted while riding.

Caliper Buckle
The micrometric closure called “Caliper Buckle” is adjustable by lifting the central buckle. In order to completely open, lift together both side buckles, or push the center button to slightly loosen one tooth at the time. The system is also adjustable during a race.

High Security Velcro
High Security Velcro straps with integrated locking polymer teeth, that engage onto each other when the strap is closed. This feature makes the closure more secure and the strap becomes unmoveable.

Sidi Heel Cup
The reinforced heel keeps the foot in a optimal position and avoids the shoe being deformed by extreme performance or prolonged pressure.

Replaceable Heel Pad
For walkability, Sidi cycling shoes include a replaceable polyurethane heel pad.

Vent Carbon Sole
The Vent Carbon Sole features a light and replaceable heelpad to improve walkability in polyurethane and a replaceable integrated toe pad/vent cover.  The key benefits of the Vent Carbon Sole are not only superior power transfer, because of its light weight and stiffness,  but also warm weather comfort.  The Vent Carbon Sole is designed with an integrated vent and air channels for heat dissipation and air flow.  The vent can be opened or closed for 4-season comfort. The Vent Carbon Sole is handmade exclusively of  carbon fiber in a weave pattern oriented at opposing angles that maximize stiffness while allowing for a small degree of controlled flex in the toe area. This carefully designed flex biomechanically relieves stress on the plantar tendon and helps promote circulation.  The Vent Carbon Sole features a standard 3-hole drilling pattern, printed 10 mm lateral and fore/aft cleat alignment scale as well as the Look Memory Eyelet® for easy cleat alignment and replacement.  For triathlon, the vent also serves as a water drain, dramatically improving foot comfort after a wet transition.