【Dual-Layer Warmth】Soft, knitted fabric with a jacquard pattern provides superior insulation and comfort for cold autumn and winter days. 【USB-Powered Heating】Conveniently powered by any 5V USB output power bank (not included), allowing you to enjoy warmth anytime, anywhere. 【Versatile Protection】Perfect as leg warmers or boot socks, these heated accessories shield against harsh weather during outdoor activities or indoor relaxation. 【Fashionable Design】Elevate your winter wardrobe with these stylish heated socks, adding a touch of elegance to your cold-weather ensemble. 【Portable Comfort】Easy to carry and use, these electric heated socks ensure you can stay cozy whether you're at home or on the go. Specifications: Material: Outer layer (Acrylic fiber), Inner layer (Polyester) Height: 42cm Width: 11cm Power Source: 5V USB output (power bank not included) Recommended Power Bank Output: 5V/2A