Thermoskin Plantar FXT Calf Compression Socks provide moderate graduated compression from ankle to calf for improved circulation. A zone of hard upward compression aimed at attaching the plantar fascia to relieve stress. A hard compression zone that targets the Achilles tendon for support and comfort. Moderate to firm grip around the arch for added support. A comfortable cushion on the ball of the foot for added cushioning. Moisture-wicking, antibacterial microbial silver fibers in toes and heels for comfort