Features:1. Keep your feet warm: Suitable for intdoor/outdoor, like skiing,fishing, walking,hunting, etc.2. Comfortable heated: Tiny heated modules with smart design, no interfering cable.3. Cotton material : Double layers. Thick and breathable. Comfortable to wear.4. Battery operated, two different styles optional.5. Great heating effect, up to 50 degC.Notice:1. Actual color may be slightly different from the image due to different monitor and light effect. Please allow minor deviation due to manual measurement.2. The battery is not included.Specification:Type: heating socksAge: adultMain fabric components: cotton 85 (%)Function: Electric heatingApplicable gender: male and femalePattern: plain Thickness: thickSize: one size Heating part: toe backHeating temperature: about 50 degC Style 1: Each set contains a pair of heating socks, 2 of 3VDC battery box (no lights on the battery box), no batteryStyle 2: Each set contains a pair of heating socks, 2 of 4.5VDC battery box (with lights on the battery box), no batteryincludes:1 pair x heating socks2 x battery box