SONY series keyboard film is made of high quality silion rubber, specially design for   SONY  brand notebook..It is thin, soft, well touched ; smart for heat radiation. The series films can prevent liquid material( water, milk and fruit juice etc ).dust (cigarette ash, biscuit ) and impurities from your keyboard. This would extend your computer appliance life in effect. Easily for cleaning and anti-bacterial to protetct your finger.It keeps good for you health.