1. Material: Nano carbon fiber heating sheet + EVA insoles 2. Dimensions: 29 x 9.5 cm(L x W) for the whole size, but it can be cut to any of your size(36-46) 3. For safety, this in-shoe warmer is designed to heat up to just above normal body temperature. 4. For perfect warming effect, new batteries are advised to install when use the insoles. 5. A pair of leg straps can be used holding the battery case and fasten around legs under trousers. 6. The insoles would not distinguish between right and left foot. 7. Lightweight, flexible carbon fiber heating elements provide safe, even warmth. 8. Notice: Only the heating sheet part generates heat, not the whole insole, but it can support your foot warm Package included 1 pair of insoles 1 pair of leg straps 1 pair of battery cases(Battery not included) 1 USB to 3.5mm socket cable adapter 1 English user manual.
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