The Vevor heated socks are designed to keep feet warm in cold conditions with four adjustable heat levels and app plus button control. Heating wires wrap the toes, soles, and tops of the feet for more even warmth. Dual rechargeable batteries provide extended runtime for hiking, hunting, camping, commuting, and other outdoor activities. The modal blend fabric with faux mink fleece lining offers soft comfort, and the socks can be machine or hand washed using the included laundry bag.