Retro nostalgia became the theme of eyewear in autumn and winter 2010. The Prada Postcard city postcard series sunglasses launched in the second half of 2010 were full of the spirit of cynicism and active thinking from the 70s and 80s. The classic CATS cat-eye style of the 80s made a comeback, with retro styling, oversized frames, and six colors, each corresponding to a city and its sister city. Choose a pair of glasses, travel to where you want to go, and perhaps you can send the glasses and postcards together to your friends to share the happiness of the journey.