The FS6 Compression Foot Sleevehas sold millions of units world wide because itis incredibly effective at relieving the pain of plantar fasciitis, chronic arch and heel pain, and swelling in the foot. Compression Zone Technology in this amazing foot sleeve provides medical grade support for the foot structure and the Achilles tendon, graduated compression to improve circulation and reduce swelling, all in an ultra-comfortable moisture-wicking foot sleeve you can wear under your normal socks and shoes. FS6 is perfect to wear overnight or throughout the day to relieve heel pain and reduce tired and aching feet.