SIDI Heel Cup: Features a heel cup that stabilizes and supports the heel. Made from anatomically shaped plastic, it reduces heel slippage and ensures improved power transfer. Provides additional foot protection in the event of an accident.

Replaceable Heel Pad: For walking, SIDI cycling shoes include a replaceable polyurethane heel pad.

Custom Carbon Fiber Sole: The sole is made from two different materials: nylon and carbon fiber. It combines carbon fiber infused into a nylon matrix. The nylon used does not absorb water and does not lose its stiffness in hot or wet weather, or over time. The result is a significantly lighter and stiffer sole.