Glovii heated clothing is a unique solution allowing you to maintain thermal comfort even on the coldest days of the year. Glovii products stand out, thanks to the use of Flexwarm, which have a positive effect on blood circulation by emitting infrared waves. Glovii clothing was designed with sportspeople in mind, especially those practising winter sports. It's also a perfect solution for bikers, construction workers, hunters, photographers and elderly persons. Features: The heating element is constructed from Flexwarm offering extraordinary reliability and durability as well as medical properties, thanks to infrared waves A pocket for storing the battery offers you comfort of use every day A large surface area of the heating element evenly distributes the heat, soothing and heating your body Thanks to the Velcro fastening, the belt may be adjusted within a wide range of waist sizes Technical Specifications: Battery: any power bank with USB 1A output (not included) Heating element: 5W - Flexwarm The heating element is located at the back of the belt Modes: 33% (LO), 66% (MED), 100% (HI) Working time: 10000mAh power bank - 33% (20h), 66% (14h), 100% (7h) Fabric: 60% polyester, 35% viscoze, 5% spandex Sizes: UNI (waist from 70cm to 140cm) Additional extension belt included in set Weight without batteries: 280g