The FS6 Performance Foot Sleeve is incredibly effective at relieving the pain of Plantar Fasciitis, chronic arch and heel pain, and swelling in the foot. Compression Zone Technology® knit into this top-selling foot sleeve provides medical grade orthopedic support to the foot structure and the Achilles tendon. Graduated compression improves circulation and reduces swelling, all in an ultra-comfortable, moisture-wicking foot sleeve that can be worn under socks and inside shoes. Use it for resting therapy or overnight. This is a single sleeve. Click here for a pair.