To dream up a pair of sunglasses, they would have to be beautiful, yet work with me on a set of challenges:
Not slide off when I am looking for my keys, not leave imprints on my nose and not seem too dark to wear indoors but too light when I look into the sun.
When we had a pair in hand that was about ten grams lighter than the average lightweight frames, with polarized lens and soft finish frame, yet still inconspicuously elegant, I knew that it is going to be summer without fussing about sunglasses!
There is one more feature: extendable leg joint. Why? When favorite frames won't do anymore because they seem stretched out, this type of joint slows down the process and prevents the possibility of breaking the leg off.