The Elma in Yellow TortoiseKey features: Frame made of cellulose acetate. Aviator frame. Lenses Include: Lenses certified ISO, IAF, and KAB MC 04. Lenses prepared, cut, and hand checked in our workshop. Frame delivered with two lens colors, easily interchangeable at your local optician or in any Jimmy Fairly store: Orange lenses are category 1: protect against glare in cloudy conditions or indoors. Grey lenses are category 3: protect against glare in sunny conditions. All our