In order for most wines to be fully enjoyed, they must be in contact with the atmosphere outside their bottle. The Eisch Superior Breathable Glass™ stemware are crafted of lead-free crystal and undergo a unique oxygenization treatment that strongly accelerates the reaction of the wine with atmospheric oxygen. In only two to four minutes - instead of one to two hours spent in a decanter - the glasses allow the individual aroma and bouquet of your vintage to fully develop.