Garmin GPSMAP 66i - 3mk FlexibleGlassTMAntimicrobial hybrid glass Kills 99% of bacteria, viruses, fungi and mold It does not crumble and does not crack Shatter resistant FlexibleGlass is a specialized combination of the best features of glass and film. The flexible, multi layer structure of hybrid glass strengthens the screen by 250%. Importantly, as a result of a fall or impact, the glass does not break or crumble. So you can use FlexibleGlass without worrying about your hand being