Y-Concept is a high quality and unique brand designed and produced in Japan. Mr. Hoi's, the designer of Y-Concept, personal predicament with his heavy and uncomfortable glasses led him to create a new comfortable pair of glasses. Y-Concept glasses are made of Beta titanium which makes it light-weight, corrosion resistant. Additionally, Beta Titanium is 3 times more flexible than the normal one. It is an ergonomic fit to the nose to keep them from slipping. This feature is what makes Y-Concept unique and outstanding from other brands; it is because we value comfort.