Okamoto Kokopita No-Slip Shallow-Cut Black Socks (1 pair) and Invisible Sneaker-Length Gray Socks (1 pair) 23cm-25cm Product Details Ingredients: Cotton, Polyester, Others ● Kokopita sneaker type. ● The unique stopper, developed through research on foot movement and fabric elasticity, follows the vertical and horizontal movements of the heel, firmly gripping the heel to achieve "no slipping." How to Use ● Because the stopper uses highly adhesive silicone material, redness or itching may occur depending on usage conditions or perspiration. Discontinue use if you experience any skin abnormalities.