The Madison Engage Glasses bring modern looks and clever tech, combined to offer a neat eyewear package. The two piece lens is sleek, giving a great field of vision and a true sports package. The clever twist lock lens is a genius system that allows for quick lens removal and installation, ideal when living in an area with variable weather conditions. Madison Engage Glasses Features Performance polycarbonate lenses give great optical clarity along with full UVA and UVB protection The durable polycarbonate lens is both impact and scratch resistant An adjustable nose piece allows you to dial in the perfect fit The frames have been developed to work seamlessly with your helmet for maximum comfort The twist lock lens system allows for quick and convenient lens swapping Includes a soft case for lens protection on the move Full UVA and UVB protection An optional RX insert is available for prescription lenses