Feature:1. Suitable for indoor and outdoor activities such as skiing, fishing, walking and hunting.2. One side heating in the sole of the foot to keep your foot whole day warm and comfortable.3. Made of high quality cotton fiber, thick, soft, elastic and breathable, which is comfortable to wear.4. The mobile battery case can hold 3 AA batteries, and put completely in the socks, which is easy to use.5. Socks can be washed with water, remember to remove the battery before washing.How to Use:1. Before using this product, purchase 6 AA dry batteries (alkaline dry batteries are recommended), and each battery box contains 3 dry batteries.2. After battery installed, put socks DC head into the battery compartment DC port, pull the switch to ON positin, and the LED red light in battery compartment will on, socks began to heat, heating temperature is constant 50 ℃, if you feel too hot or want to preserve heat, pull the switch in the battery compartment to OFF position, then stop of power supply, it can heat preservation for a period of time. The heating temperature varies with the ambient temperature.Specification:Item Type: Electric Heated Socks Material: Cotton, polyester Battery: 6 x AA Batteries (Not Included) Sole Size: Approx. 21cm / 8.27in Hose Size: Approx. 27cm / 10.63in Package List:2 x Socks2 x Battery Compartments1 x Instruction