The Superfeet Carbons fit in a wide range of tight-fitting sports shoes, like cleats and running shoes. They're lightweight and breathable, and provide support, balance and comfort.
There are perforations under the midfoot and forefoot. This helps reduce weight and improve breathability of your insoles, which is especially important if you tend to sweat a lot.
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).
Superfeet insoles can not be machine-washed. You need to hand-wash them with soap and water, and allow them to air-dry. If you do so, they will last for up to 12 months or 500 miles, whichever comes first.
The perforations improve ventilation, and the closed-cell foam has antimicrobial treatment, which discourages bacterial growth and helps reduce odor. The closed-cell foam also means that there are no pores in which bacteria could grow.
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.
The foam under the forefoot is made of a firm material that should return energy as your foot leaves the ground. The heel area has a softer material that absorbs shock. The whole insole contours your footstep, minimizing unnecessary movement, and reducing blisters and hot spots.
Many competitors make separate models for different arch heights. This can make choosing the insoles confusing, since you have to decide between minor differences between models as well as their arch height. CurrexSole RunPro insoles come in three different profile heights- high, medium and low, and they have a very handy chart to help you choose the right size (it's listed as one of the images in the product's Amazon page).
Many good-quality running shoes have built-in arch support in the soles of their shoes. The RunPro are quite expensive, being in the 50$ range, so if you're not sure whether you need high-end running insoles, you may want to try a cheaper, less fancy pair of insoles first.