Practical Polyester Fabric : Made from polyester, this jackets offering excellent tear resistance and long lasting wear, perfect for industrial settings with frequent use Efficient Cooling Design : Built in USB fan with 3 adjustable speeds quickly circulate air to reduce body temperature, ideal for workers in high temperature environments like workshops and construction sites Enhanced Night Visibility : Reflective strips provide extra visibility in low light conditions, ensuring safety for nighttime or dimly lit work environments such as warehouses and outdoor job sites Ergonomic and Comfortable : Designed with human friendly tailoring for unrestricted movement, suitable for active workers like assembly technicians and logistics handlers. Multiple sizes and colors available Convenient USB Power : Powered via USB port , eliminating the need for special batteries—ideal for mobile work scenarios like temporary construction sites or outdoor operations