Battery heating socks, suitable for winter cycling, motorcycle riding, hunting, fishing, camping, etc. Features: After power through the battery, intelligent temperature control switch can be adjusted three gears temperature. Perfect for arthritic feet and long-term cold feet and stiff joints. Give you a warm winter. Soft comfort for feet, elasticity. The socks are free size, perfect for both men and women. The socks with battery box can be as a nice warm heart gift for family, parents, friend in cold weather. Perfect indoor warm feet gear for cold weather. Also fine for outdoor athletic activities. Cotton material, absorbent, breathable, quick-drying, elastic thickened. Specifications: Type: type A, type B, type C, type D (optional) Material: cotton Size: one size Package size: 210 * 120 * 70mm / 8.3 * 4.7 * 2.8in Package weight: 250g / 8.8ounce Packing List: 1 * Pair of Socks 1 * Battery Box