FS4 Plantar Fasciitis Sock The FS4 Plantar Fasciitis Sock provides medical-grade orthopedic support. Its patented Compression Zone Technology helps relieve and prevent pain, offering relief from previous injuries, plantar fasciitis, chronic heel pain, swollen arthritic ankles and feet, or poor circulation. Benefits for Recovery This sock promotes proper circulation, which is essential for restoring and rebuilding muscles after intense training sessions. It speeds up recovery and is effective for both preventive purposes and when an injury occurs. Comfortable and Lightweight Design The FS4 features a lightweight design made of a moisture-regulating material for optimal comfort throughout the day. Anatomical Fit With an anatomical heel and vamp design, the sock ensures a perfect fit. It is particularly strong in exposed areas and includes four compression zones to provide maximum relief and durability. Color Options and Packaging OS1st® FS4 Plantar Fasciitis Socks are available in black, gray, and white. Sold in pairs.