The One Ultem 2294 Gray w/Yellow eyeglasses are lightweight, extremely flexible yet super strong with 100% memory allowing the frames to bounce back to their original shape. The rectangular shaped lenses are rimmed in a clear dark gray frame with matte finish. The bridge of the frame sits high and the yellow winged temple pieces have memory flex yellow and gray rubber covered stem tips that are there to keep these specs fitting great at all times. The special Ultem material has demonstrated no risk of allergy and is FDA and CE approved.