From Superfeet:

Superfeet Run Support Low Arch insoles add stability and comfort to your running and walking shoes, improving efficiency and reducing fatigue. the responsive EVOLyte® carbon fiber cap and thin, high-density comfort foam combine to create smooth and efficient energy transfer throughout your gait, from foot strike to toe-off. Thin profile made to fit well in slim-fitting running and walking shoes.

Great for slim-fitting athletic footwear!