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Keep your little piggies toasty with the USB Heated Insoles Available in UK shoe size: 3-6 or 4-8 Set includes 2 x insoles, 1 x USB cable and a size card Soft and comfortable to wear - simply cut to preferred fit and slip into your shoes Made with premium carbon fibre which is deodorising Thermal insulation function stops your soles from freezing Insole thickness: 5mm Save 83% and stay snug with the USB Heated Insoles for 6.99 pounds