Product information: Upper material: cotton Applicable gender: neutral/male and female Color: thermostat gray (only electric socks), thermostat black (only electric socks), thermostat gray (only electric socks), thermostat black (only electric socks), thermostat gray (with battery) Box), thermostat black (with battery box), thermostat gray (with battery box), thermostat black (with battery box), thermostat gray (with 4000MA lithium battery + charger), thermostat black (with 4000MA lithium battery + charger), thermostat gray (with 4000MA lithium battery + charger), thermostat black (with 4000MA lithium battery + charger) Size: one size Style: American Style: warm foot socks Heating method: electric heating Power supply mode: power bank, battery box (No. 5 battery), lithium battery A: Constant temperature gray (only electric heating socks included), B: Constant temperature black (only electric socks included), C: Adjustable temperature gray (only electric socks included), D: Adjustable temperature black (only electric socks included), E: Constant temperature gray (with battery box), F: Constant temperature black (with battery box), G: Adjustable temperature gray (with battery box), H: Adjustable temperature black (with battery box), I: Adjustable temperature gray (with 4000MA lithium battery + charger), J: Adjustable temperature black (with 4000MA lithium battery + charger), K: Constant temperature gray (with 4000MA lithium battery + charger), L: Constant temperature black (with 4000MA lithium battery + charger) Packing list: Reference style suit