Okamoto Socks Socks Supple for Women okamoto Socks Long to promote blood circulation while sleeping Color: Sax (light blue) Size: 23-25cm Brand new, unopened. Immediate purchase is welcome (*^^*) [Product Description] These are compression socks for sleeping. Using a soft material to reduce the discomfort of compression socks. By applying pressure in a spiral from the arch of the foot along the muscles of the foot, the pressure is not too tight, and the pressure is exquisite. The unique ratio of compression values for the arch of the foot, ankle, and calf promotes blood circulation and reduces swelling. [Material] Nylon, rayon, cotton, polyurethane (Quoted from the official HP above)