Lightweight, titanium frames. Cateye, purple. Case included. Made in Denmark. Titanium is one of the most ingenious natural elements, which possesses unique properties. Titanium is ultra-lightweight, flexible, durable, hypoallergenic, and non-corrosive. You can always tell a LINDBERG frame by the iconic hinge designs. The patented titanium hinges are made with no screws, rivets, or unnecessary elements.