The Glovii GB1U is a heated, flexible, universal waist/ back protector belt, designed for winter sports and outdoor activities in cold environments. It is made from materials including Elastane and Polyester (detailed composition in some sources: 60% polyester, 35% viscose, 5% Spandex). It utilizes Flexwarm® heating technology with a carbon fiber heating cable. It operates with an external USB power supply (requires an external power bank) and offers 3 levels of heating. It features overheat protection (two temperature sensors are mentioned), adjustable power, and a removable heating element for easy cleaning. Suitable for both men and women, in gray color. Also ideal for riders, construction workers, hunters, photographers, and seniors seeking thermal comfort and improved circulation.