MEGATHERM. Super lightweight filling made of microscopic polyester fibers with exceptional thermal efficiency creating an isolation camera effect. This filler is also very comfortable thanks to its high flexibility and fast drying.. Wash in cold water. Do not use a tumble dryer. Do not iron. . Fabric with radiant thread incorporated in the front and back of the garment.Multifunctional system: can be used as a normal or heated garment that provides 3 levels of heat, adjustable by means of the LED button located on the chest. It is activated by pressing it for 3 seconds and with each new simple press the temperature and the color of the light are changed. To turn off the system, the button must be pressed again for 3 seconds. It works with autonomous batteries connected by a USB terminal lodged in the left pocket of the garment.