These sunglasses provide great coverage.  We live in the mountain west and need a great pair of glasses.  These sunglasses do a great job of taming the high altitude sun.  And to make it even better, they are very light and don't slip.  They are a touch bigger than your typical around-the-town sunglasses, but that's the price of the additional coverage and protection.  So far, they have been durable and scratch resistant.  I will update the review after a couple of months of use over the summer.