Far infrared heating insole

Far infrared heating insole:1.Three AA batteries for each insole with sepearting battery box,which can be tied to ankle. 2.Scientific in design,convenient to use,size can be cut out accordingly. 3.Equal in heating distribution,temperature is about 42 °CFar infrared heating insole Specification: Heating insole with two battery box: 3 AA dry batteries or rechargeable batteries each piececarbon fiber heating element.with cutting guide, fit for size from 38 46with two battery box bag for tying on the legKeep warm for 2 H by 6 pcs AA dry batteries (650mah)