From Superfeet:

Superfeet Run Support High Arch insoles help runners reduce foot fatigue while gaining efficiency. The responsive EVOLyte® carbon fiber cap and two layers of AeroSpring™ Rebound foam combine to deliver exceptional comfort and smooth and efficient energy transfer through your gait from foot strike to toe off. Made to replace the removable liner in roomy to moderate-fitting running and walking shoes. Trim to fit your shoe size.