"I love these shades for the fact that they fit perfect, and they cover any angle of sunshine into my eyes. Most shades doesn't cover the sides, but these does. Although it's plastic it seems more sturdy than others. It also doesn't fall down on your nose and they don't move although I'm biking agressively and running. Lenses are plastic, and you should be careful to always keep them in the cover. The cover is a bit big, but just slightly bigger than others."