If you prefer the softer rubber used in Imersion foot pockets but find there a bit too much flex in the heel, our specially made Carbon Inserts are for you. Made of high quality vacuum infusion carbon fiber, they reinforce the heel and the midsole of the foot pocket, improving the power and fin response.
Although Carbon Inserts are just 1 mm thick, they do add +1 to your foot size. For example, if you are normally a size 41, you should order a size 42-44 foot pocket for use with the Carbon Insert.
Carbon Inserts are only for use with Imersion foot pockets.