This Fan Free Cooling Mat is the eco-friendly, low cost way to stop your laptop overheating. Using no power, it will help prevent temperature burns on tables or desks at work, or keep you comfortable while working on your lap at home. Help extend the life of your machine by keeping it from overheating, and making it less likely to crash. Cool to the touch and super lightweight at only 640g. Suitable for notepads/laptops from 18cm to 37cm (7" to 14-1/2").