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 socks Age: adult Main fabric components: cotton 85 (%) Function: Electric heating Applicable gender: male and female Pattern: plain Thickness: thick Size: one size Heating part: toe back Heating 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 battery Style 2: Each set contains a pair of heating socks 2 of 4.5VDC battery box (with lights on the battery box) no battery includes: 1 pair x heating socks 2 x battery box "