Fasttrack glases are actually very costly . I was buy from amazon few months earlier .They are costly but quality is nice .It was slight unbreakable as compare to other normal sun glasses.They are available in many colors and frames .Different frames and styles incresas the cost of the glass .however it was costly but usefull.if cost is lower , increases the chance of selling these fastrack glass.aThis was the actual reasin for low sale of this glasses.LASTLY THIS GLASSES WAS NOT UNIQUE SO OTHER SUN GLASSES MAY BE TRY MUST