Lens The Lexan lens that comes with the Strata Goggles is mirrored to give you ultimate glare reduction in bright light conditions for improved levels of visibility. The Lexan is integrated with two different technologies which makes the lens anti-fog and scratch resistant for a long-lasting level of superior vision. Frame The Strata Goggles come with a curved frame that has been specially designed for improved comfort and for a larger field of vision. The interior of the frame is dual-layered with special face foam that soaks up sweat preventing it from interfering with the positioning of your goggles so that even at your most active they won’t move about your face. Read more… The frame comes with a 40mm silicone coated strap that also helps keep the goggles stable.