These glasses are crystal clear, very lightweight and durable. They are almost too light weight. Sometimes I over handle them, bc I’m not used to such a lightweight glass. The sound it makes when it clinks on a table, or with another glass is quite unique. It almost sounds like acrylic. But I’m sure that has something to do with the durable engineering that was incorporated to ensure its chip resistance. This glass did survive my dishwasher without breaking. But I prefer to hand wash. Easy to clean. Lovely to hold. I enjoy drinking out of these elegant, yet durable glasses.