The OS1st FS6 Compression Foot Sleeve relieves Plantar Fasciitis, heel pain and poor circulation. If you suffer from plantar fasciitis, heel pain , foot swelling, or poor circulation in your feet, you know how frustrating it can be. OS1st is the inventor of the FS6 Compression Foot Sleeve for relief of certain painful foot conditions like plantar fasciitis. With over 1,000,000 sold, the FS6 is the #1 sports brace product in the specialty running shop market in the United States! The FS6 Compression Foot Sleeves relieve symptoms of Plantar Fasciitis, Achilles Tendinitis, heel pain, foot swelling, and other discomfort.