Wearing these socks during physical activity will prevent Plantar Fascitis symptom onset and act as an overall foot health aid. With precise targeted compression levels, the FS4 is designed for proper foot support and injury prevention. The seamless construction with light padding in just the right places creates surprisingly comfortable support. The soft, moisture-wicking fabric with anti-odor treatment creates a healthier environment for your feet. This is one of the first sock products with true orthotic benefits that strengthen the foot structure, help prevent Plantar Fasciitis, arch strain, swelling and other conditions.