Why it's needed
Feet are our most common interface with our surrounding environment. We need strong, pliable and comfortable feet to maintain a stable foundation for our body.
Often if there is an area of pain or irritation in the foot we will avoid putting pressure on that area, thereby throwing off our gait. This can then cause new problems further up the chain: in the ankle, knee, hip or lower back.
Given that your feet and ankle are one of the most complex structures in the human body, not to mention your vehicle in life, it pays to not ignore cracks and calluses!