The idea is brilliant yet simple: that you can snap between moods in your glasses just like you would with covers for a phone. Experience the freedom to change” is the tagline behind Carrera Interchangeable’s. Customizing your glasses from one day to the next may be nothing new to sports enthusiasts who change lenses according to the conditions, but here it’s the front cover which clips onto the lightweight metal frame, allowing you to enjoy a wide range of styles in just one pair of glasses!