The more I read about my pricey garmin watch, the more I worried about scratches on it...seems like a lot of people complained about this. I suppose the complaints are appropriate. it is an expensive thing, so you want to keep it pristine, if at all possible. And, since its a piece of athletic equipment, it will be put to work outside and in places that are prone to scratches. So, I purchased a Zagg Invisible Shield. The 39mm size here fit the Garmin Forerunner 610 perfectly...it was easy to install, came with all the supplies to clean the face prior to application, smooth the front after application...took seconds to install. It also does not in any way interfere with the use of the touchscreen. Small price to pay to keep the face clean and readable for years to come, right? Also, chances are you can find a discount code that is valid here.