A contoured or ergonomic insole is a molded footbed with built-in arch support and a shaped heel cup. Unlike the basic flat foam insoles found on entry-level shoes, these hold your foot in a more stable position, which helps you transfer power to the pedals more efficiently and reduces fatigue on longer rides.
This type of insole is common on mid-range to high-end cycling shoes and is a great match for riders with normal arches who want better support right out of the box. Some contoured insoles even come with interchangeable arch inserts, letting you fine-tune the fit without buying aftermarket footbeds.
If you're doing performance riding—road cycling, gravel racing, or long-distance efforts—a contoured insole is definitely worth seeking out. However, if you have very flat feet or unusually high arches, you may still need to swap in a specialized aftermarket insole for ideal comfort.