We simply define "primalfoot" as letting your feet be feet first without imprudent footwear. When something is primal, it functions at a very core level without outside influence. It's instinctual. For feet, the most pure form of this is barefoot, wearing nothing on our feet at all. There are also various forms of "primal footwear" that generally allow feet to function naturally. These shoes and sandals are light, flexible, have a very thin sole with no arch support or cushioning and allow feet to breathe well while maintaining a natural walking gait. The only problem with this footwear, however, is that it still creates a barrier between the soles of the feet and the ground. This barrier cuts off the thousands of nerve endings in our feet from properly sensing the ground beneath us.