Shady Rays has a Flash Sale for Memorial Day. You get 50% off when you buy two or more pair. They'll also donate two meals to military families with each order. The sunglasses have a lifetime replacement warranty. You get three replacements for lost or broken shades. There is an $8.95 handling/shipping charge for the replacement glasses.
They are decent glasses and I like the polarized lenses. It's nice having decent sunglasses that I don't have to worry about if they get messed up a bit.