Fastrack is India's largest youth fashion brand with a snazzy collection of bags, belts, sunglasses, wallets and watches. For the time being, it produces a wide range of products and collections. Since their global operations are currently not spreading throughout America, therefore, you can get them on the Internet. http://www.fastrack.in/products/, this is their official website, where you can find almost what you want and order online.
One of my friends bought a pair of frastrack sunglasses online last year, and then she became a huge fan of it. Since her wonderful experience, we are all encouraged to buy it. I have already searched a lot of information about it, including online and off-line. I mean their sunglasses are not my type.
But I can tell you how to buy that online.
First of all, you can log on eBay or Amazon or the other sales web, personally I prefer eBay and Amazon. Then you can insert "frastrack sunglasses" in the search bar, then the list will come out; what's more, you can compare the price and the credit of the owner. Finally, you can order the comparative perfect one.
By the way, you can have a look at their official web, there are a lot of newly launched sunglasses.
I have seen a type of fastrack sunglasses on the amazon. You could just go there and have a look. However, you could check other online store to have a search. Maybe the price is much cheaper. You could base on your favor and hobby to choose the suitable one.