Really bummed about these glasses because I thought they'd be a great value for the price, but my &#34;metal reinforced hinges&#34; must have been aluminum or zinc, because one hinge broke the first time I wore them. (Which was en-route to a long hiking trip, so now I have to buy something sturdier at Walgreens...)<br /><br />The lenses do block out a lot of light, however, and the company shipped it quickly. Was just surprised they didn't last as long as some of the freebies I've had in the past.