What Makes Shells Eyewear So Different What makes Shells Eyewear so unique is the ability to tan thru the frame. Unlike traditional eyewear, Shells allow UV rays to penetrate the frame while still protecting your eyes via a sunglass lens or a tanning bed eyecup. While tanning with Shells, you can be sure that the eyecups will stay on your eyes even when changing positions or using a stand up bed. Shells can also be easily worn as regular sunglasses by simply changing the lenses. Shells are convenient, light weight, durable, and affordable. Shells will allow you to achieve the best tan possible while ensuring the safety of your vision. So grab your pair of Shells and Leave The Lines Behind!