Have been using 3M brand safety readers for some time now, and The 2.5 were getting hard to find at the local big box store. Found these online and thought to give them a try. So far they have really stood up to the test. I wear them at work everyday and so far no scratches (unlike the 3m brand) and i bought 3 pair for the same price as one of the 3M. The only drawback is that the 2.5 Area is fairly small so getting use to them takes a bit of patience. I would recommend them based on toughness and the price.