2.5’s and Swissflex were designed to be lightweight, and extremely customizable. The designs are rimless and semi-rimless and are available in hundreds of color combinations and shapes. Surprising, they are also very durable and fit both for kids and adults. Kawasaki’s are made of 100% titanium. They have a patented tension mounting that holds the lenses tightly into the frames. The options for shapes and sizes are endless, since each pair is made-to-order for every customer.