Casual Sunglasses KNOW | POC | EF Education First Mens | Pro Team Cycling KitEF Education First Pro Team POC KNOW casual sunglasses Large, round lenses give excellent coverage for a clear view of what lies ahead as well as optimal sun protection. The Know has a frame made from lightweight, flexible and durable grilamid and is suitable for almost any athletic endeavor. The grippy rubber stays grippy even when wet, so the glasses will stick to your nose when you move, regardless of rain or transpiration.