I received this product as a review project for my blog... I liked them enough to post part of that review here: ...The glasses we received were black and silver in color, and the lenses had a grey tint. These imported glasses are made of a very lightweight, shatterproof, flexible, durable stainless steel metal frame (57 mm). The composite Tr90 nylon lenses are non-polarized, but are created to block 100% UV (UVA, UVB, UVC and up to 400nm of blue light) – which will give users the best visual clarity possible for sunny days, winter or water glare, and glare off buildings, roads and vehicles.<br />Very lightweight glasses might seem cheap, but when you really look at the design you’ll notice metal hinges that don’t have screws to catch hair or scratch skin or come loose over time. The ends of the arms (that go over the top of the ears) and the nose bridge are both encased in white rubber pads to improve comfort. You’ll hardly notice these things are on top your head and may end up running around looking for them, wondering where you left them!  Ha ha<br />These are designed for men – and the first thing my husband noticed was that the lenses were out from the face a little and he thought that would definitely prevent them from fogging up or getting sweat on them which often happens to his other pairs when he’s cycling, hiking or snowshoeing. Because these are so lightweight it is unlikely that they would slip off the nose or slide around on the ears when the head begins to sweat.