Medical Grade Variable Compression Technology: FXT Compression Socks combine medical grade compression, support and enhanced comfort for pain relief from Plantar Fasciitis, Heel Spurs, Arch and Heel Pain. Variable Compression Technology provides varying compression levels to targeted areas of the foot: Extra Firm at the Achilles, Firm at the Plantar Fascia, Moderate at the Arch and Ball of the foot. These targeted compression zones help relieve Plantar Fasciitis, Heel Spurs, Arch and Heel Pain. What is Plantar Fasciitis? The Plantar Fascia is the tissue that runs from the heel bone to the ball of the foot. It supports the arch and absorbs strain we place on our feet. Plantar Fasciitis occurs when the Plantar Fascia is placed under too much stress, resulting in heel pain, dull aches or stiffness in the foot. Common causes of plantar fasciitis include flat feet, high arch, unsupportive shoes, extensive running, standing on hard surfaces, weight gain and aging. How do FXT Compression Socks Help: • Medical grade compression to unload stress on the Plantar Fascia • Arch support and elevation • Compression on the Achilles' tendon • Extra cushioning at the ball of the foot • Soft, moisture wicking breathable fabric for comfort • Silver microbial fibers in the toe and heel have anti-odor and anti-bacterial properties • Designed for everyday and active wear • Sold by the pair.