High-quality Material: This heating stocking is made of 80% cotton, 12% polyester and 8% elastic fiber material, so it is absorbent, breathable, quick-drying, and elastic. Suitable Occasions: Focusing on the toes to prevent the feet from getting cold, which can promote blood circulation. Apply to arthritic feet and long-term cold feet and stiff joints, giving you a warm winter. Heating Piece: The heating piece is inside the sock. Specially designed battery pocket is safe and easy to carry.