Titanium would be the strongest metallic for its pounds, which allows you to use your sunglasses actively without the need of worrying about them breaking. Transitions lenses lighten and darken depending on your environment. This technological innovation enables you to use your prescription eyeglasses as vision-correcting sunglasses! Their overall flexibility http://lukasahwjv.digiblogbox.com/20627002/5-essential-elements-for-titanium-glasses