Feature:1. Focusing the warm cover on your feet can stimulate your and keep your feet warm.2. Made of high quality cotton fiber, it has functions of sweat absorption, breathable, quick drying, and elasticity.3. Various outdoor activities in winter, such as fishing, camping, skiing, hunting, hiking, etc.4. Each box of mobile battery box can hold 3pcs AA batteries (not included), which can keep warm for a long time.5. Can be completely put into the socks to instantly heat your feet and bring a good experience.How to Use:Install AA battery (not include) in the battery box, connect DC interface of sock to the battery box, turn on the battery switch and start heating; put on the sock, tie the strap to leg and fix it, and put battery box inside.Specification:Item Type: Heated SocksBattery Box Battery: A single battery box needs to install 3pcs AA batteries, a total of 6pcs AA batteries (Not include batteries)Sole Length: Approx. 19cm/7.5inTube Length: Approx. 27.5cm/10.8inLeggings Strap: Approx. 42.5 x 10.5cm/16.6 x 4.1inMaterial: Cotton Fibre Package List:2 x Heating Socks2 x Dry Battery Boxes2 x LeggingsNote:Please allow 1‑2cm error due to manual measurement. Thanks for your understanding.