Features:Ergonomic Design: This electric insoles can be bent by 180 degree. It is washable and reuseable. Rechargeable batteries are mounted to your ankle via hook and loop tape. These can be charged by mobile phone ac adapter. The longest time lf continually heating can up to 5-6 hours. You could stop heat it when you feel warm.Exquisite processing ensures soft and comfortable touching feeling. Cuttable feature allows you to make the best size for you.Under ordinary temperature, the heating temperature can maintain at around 50 degree centigrade.Notice:Objects may have Logo,if you want to know,please contact us.Otherwise,please do not bid.Actual color may be slightly different from the image due to different monitor and light effectPlease allow 1-3cm deviation due to manual measurementSpecification:Material:Carbon fiber,EVASuitable for shoe size 35-45, Easy to adjust to the size you want.Thickness:0.7cmincludes:1 Pair x Heated Insole(No battery)