Sizes: Valid in UK sizes 8-18. Power: Powered by USB (not included), offering infrared heating which is safe and non-radiating. Coats and jackets: Get a women's thermal heated gilet. Five colours: Choose between white, grey, red, blue and black. Three temperatures: Vary between level 45℃ (red light), 35℃ (white light) and 25℃ (blue light) depending on your needs. Material: Made from 100% polyester. | Women's Thermal Heated Gilet - Black - UK | Wowcher