Introducing the ESS EE9019-03: The Crowbar interchangeable-lens sunglasses are both lightweight and resilient. They feature innovative design elements like a frameless bottom lens and a unique Lens Gate. These additions make lens changes faster and the field of view wider than previously possible.Built with military-grade polycarbonate lens material, you can expect crisp and clear optics along with extensive ballistic protection. The design is purposefully lightweight and balanced for optimal comfort. It won\'t obstruct hats, helmets, hearing protection, or communication equipment making the Crowbar one of the most adaptable sunglasses ESS has ever produced.