I bought this product recently.  at firs toght it was maybe too big but once I got used to them they are great.  I use them mostly to play tennis and are very comfy and feel secured.  The sweat gets to them but not like other pairs I had.  In the Florida heat they perform very well.  Polarized is the way to go.  My eyes are rested after a day out in the sun.  they are flexible, yet sturdy and lightweight. I also use them daily not only for tennis. I recommend these.