The Superfeet Carbon are low-volume insoles, best used in hiking or running. They're perforated to improve breathability and the heel support is made of carbon fiber to make them lighter.
Pro Fits shallow shoes without compromising support and comfort
The heel caps and arch support are shallower than any other Superfeet insole, but the basic construction is the same. This allows the Carbon insoles to fit in a wider variety of shoes, and can even fit some dress shoes (if they have removable insoles). The Carbon insoles stabilize and support your feet by keeping your heel in position, and letting the heel caps absorb part of the shock as you're running. This reduces stress on your feet, ankles and knees, so you'll be more comfortable instantly (if you get the right size).
Con May need some time to break them in
Superfeet recommend wearing their insoles a few hours at a time for the first week, so your feet get a chance to get used to them. However, many users have stated that they instantly felt a positive difference, and didn't need aay adjusting time. Still, you should be careful to pick the correct size and arch height for your feet, and allow some time before returning them.