Alexander Daas eyewear style Wisdom Y features a beautiful design on the inside of the temple, while keeping the look of the frame clean and elegant on the exterior. These glasses are comfortable plastic frames with a unique half rim nylon string front. The frame also comes with an eyewear chain that you can either hang the frame on, or it can clasp into the temple tip holes to wear it like an eyewear retainer. And the case folds completely flat when not in use. Very innovative.