Those tortoise shell sunglasses are quite popular in the world. And generally speaking, their frames are made up of plastic, not metal and that is the most striking difference between other types of sunglasses. I find them quite amazing. And you could get a lot of tortoise shell sunglasses on Amazon, where all type of sunglasses are on sale.
Yes, the tortoise shell sunglasses are so amazing because of the material which attracts a lot of users. It is said that the tortoiseshell frames for eyeglasses were primarily made of celluloid and not the actual turtle shell. The design of them is so special which will be different from other kinds of the sunglasses. If you have any interest on such type, you could go to the online store to have a check.
Well, generally speaking, this kind of sunglasses is made of tortoise shell. First, you should know that tortoise shell is a material produced mainly from the shell of the hawksbill turtle, an endangered species. And it was widely used until the 1970s in the manufacture of items such as combs, guitar picks and knitting needles, especially sunglasses. By using tortoise shell, it will make the sunglasses have a lot of advantages. For example, it has beautiful appearance. Also, its durability and its organic warmth against the skin make people feel well. By the way, the excellent bending properties are very wonderful. Because of the durability, tortoise shell sunglasses can be used for many years. However, nowadays, tortoise shell sunglasses refer to sunglasses with tortoise shell color. Sunglasses with the shell of the hawksbill turtle don't exist for protecting environment.