Product Description Keep the cold out from toe to heel. These PRO-grade heated socks hide ultra-fine carbon-fiber filaments in a breathable cotton knit, delivering instant, even warmth across the sole and instep. A 7.4 V 5000 mAh battery pair powers four precise heat levels (45-65 °C) for as long as 10.5 h on low, while the free Bluetooth app (iOS/Android) lets you switch settings, check battery %, or set an auto-off timer without rolling up your pants. Designed for skiing, hunting, camping, or simply frozen commutes, the socks stay snug at calf height, wick moisture, and can be machine-washed after the batteries pop out. One charge, all-day heat. Features: 4 temperature settings: 45 °C / 55 °C / 60 °C / 65 °C; choose on the sock or via phone app 5000 mAh Li-ion batteries = 3.5 h on high, 6.5 h on medium, 10.5 h on low Full-sole & instep carbon-fiber heating zone—can’t feel wires, heat spreads in