The New Bluetooth Controlled Heated Insoles are about more than toasty toes. Get full control and overview of heat settings, battery level and heat time with the new HeatX APP. They are ergonomically designed to give support, have a gel cushion heel for extra comfort and fits easily into most shoes and boots. Thin, rechargeable, integrated battery means youll never have to worry about forgetting them or dealing with cables to an exterior battery pack. Feet need good breathability for comfort and health, and our insoles are designed with ventilation holes across the entire insole for optimal air and heat distribution. With multiple and easy charging options, these insoles couldnt be more convenient, unless they did the walking for you. Charge with USB in a power outlet, power bank or in your car Up to 7 hours battery life Remote control operated Thickness: 7mm heel14mm mid5mm toe Integrated and rechargebale 1500 mAh battery. Weight: 120 gram / 4.2 oz (per insole) Shock absorbing