Durable and flexible - ESS Interchangeable Component Eyeshield (ICE) Tactical LE Safety Sunglasses

Right up front I will say at least one of these lenses should have been polarized. Having said that, the overall kit seems to be of high quality. The frames are very tight so you have to be patient and careful when switching lenses. It's good that you get two complete frame kits. Vision is very clear and not distorted. The frames are very thin but strong and fit very well under a helmet or hearing protection. You can bend the ear pieces to fit your head. Pretty good (but really large) case included.