Made with Luigi Bormioli's latest innovation, SON.hyx. SON.hyx is a high-tech blown lead-free crystal glass that does not contain any heavy metals. This glass present outstanding chemical, optical and mechanical properties. It is strong with a higher resistance of the rim, a higher resistance to impacts, and a higher resistance to twisting the stems.To make it even stronger, the glass was reinforced with titanium. The permanent anti abrasion treatment on the glass’ hardens the glass surface increasing its resistance to abrasions. Features: SON.hyx Crystal - Our Hi ball glasses are made using the latest innovation SON.hyx, a high-tech blown lead free crystal glass. This strong crystal is highly resistant to breakage Titanium Reinforced - Our hi ball glasses have also been improved with a permanent anti-abrasion treatment applied directly to the glass’ to increase resistance to breakages Dishwasher Safe - This glasses set is highly practical and fully resistant to washing cycle