If you bought a Surface Pro you are probably looking for a case to protect the tablet and its keyboard when you are on travel. Here is a selection of what your options are. If you are willing to make a search of your one, you should probably focus on Amazon and eBay and pay attention to user reviews as some of these products are marketed as Surface Pro cases but will only fit a Surface RT (or fit the Surface Pro without its keyboard).
The link will take you to the Microsoft Store where a few other cases are listed.
For the Nixon case, there is also a review available on Youtube.