The HARPER is a an over acrylic frame with a key hole shaped nose bridge Dimensions: 50☐18-141mm (frame-nose bridge-temple) The HARPER has gadget safe, anti rad, and anti blue light lenses. It's made from durable acrylic with thin soft matte temple arms; sturdy metal hinges; replaceable lenses; perfect for everyday use Disclaimer: All Baobab Eyewear frames have replaceable lenses. In fact, you have the option to have us replace and upgrade the frame's lenses and we can delivery them to your doorstep already upgraded. However, if you choose to have the frames replaced someplace else, other optical stores may refuse to change the lenses since they prioritize their products. This does not mean our frame's lenses are not replaceable, rest assured there are other opticians that will be willing to replace them for you, or better yet, have Baobab Eyewear skilled opticians upgrade your Baobab eyewear frames for you for a hassle-free transaction.