The FuelCell SC Elite v4 is a high stack race-day shoe with a carbon fiber plate for energy return. The shoe has a relatively low drop at 4mm and a rockered design for smooth takeoff during your stride. The cushion is similar to the Revel, but stabilized by a specially designed carbon plate that increases the efficiency and energy return during impact and toe-off. These are a great marathon shoe and the less aggressive drop makes them comfortable for a wider range of paces.