The Epoch Hybrid is a 3-in-1 safety rated frame. It can be worn as a goggle, foam riding glasses or a regular sunglasses. The vented foam is removable leaving the frame open like a regular sunglass frame. The arms come off allowing you to attach an adjustable goggle strap.; 100% UVA/UVB protection Shatterproof polycarbonate lenses High-impact polycarbonate frames Includes interchangeable arms and adjustable elastic strap Meets or exceeds ANSI Z87.1 standards