Luigi Bormioli Gourmet 20-1/2-Ounce SON.hyx Wine Glasses,Set of 6 Luigi Bormioli Gourmet 20-1/2-Ounce Wine,Set of 6 Luigi Bormiolis proprietary material called SON.hyx allows the glasses to be extremely break resistant and transparent. 25 Year Guarantee! The guarantee covers chipping on the rim or foot as well as any discoloration or cloudiness resulting from dishwashing. Innovative glassmaking techniques produce perfectly smooth rims and edges Dishwasher-safe; made in Italy